diff --git a/applications/utilities/postProcessing/noise/noise.C b/applications/utilities/postProcessing/noise/noise.C
index 77e549c9de..7230e0cd04 100644
--- a/applications/utilities/postProcessing/noise/noise.C
+++ b/applications/utilities/postProcessing/noise/noise.C
@@ -81,7 +81,6 @@ See also
 #include "noiseFFT.H"
 #include "argList.H"
 #include "Time.H"
-#include "writeFiles.H"
 #include "CSV.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
diff --git a/src/OpenFOAM/Make/files b/src/OpenFOAM/Make/files
index c975296d1d..e530cb2a00 100644
--- a/src/OpenFOAM/Make/files
+++ b/src/OpenFOAM/Make/files
@@ -222,7 +222,7 @@ $(dll)/codedBase/codedBase.C
 db/functionObjects/functionObject/functionObject.C
 db/functionObjects/functionObjectList/functionObjectList.C
 db/functionObjects/writeFile/writeFile.C
-db/functionObjects/writeFiles/writeFiles.C
+db/functionObjects/logFiles/logFiles.C
 db/functionObjects/timeControl/timeControl.C
 db/functionObjects/timeControl/timeControlFunctionObject.C
 db/functionObjects/regionFunctionObject/regionFunctionObject.C
diff --git a/src/OpenFOAM/db/functionObjects/writeFiles/writeFiles.C b/src/OpenFOAM/db/functionObjects/logFiles/logFiles.C
similarity index 78%
rename from src/OpenFOAM/db/functionObjects/writeFiles/writeFiles.C
rename to src/OpenFOAM/db/functionObjects/logFiles/logFiles.C
index 4fdee06be4..32931590b5 100644
--- a/src/OpenFOAM/db/functionObjects/writeFiles/writeFiles.C
+++ b/src/OpenFOAM/db/functionObjects/logFiles/logFiles.C
@@ -23,18 +23,18 @@ License
 
 \*---------------------------------------------------------------------------*/
 
-#include "writeFiles.H"
+#include "logFiles.H"
 #include "Time.H"
 #include "IFstream.H"
 
 // * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
 
-void Foam::functionObjects::writeFiles::createFiles()
+void Foam::functionObjects::logFiles::createFiles()
 {
     if (Pstream::master())
     {
         const word startTimeName =
-            obr_.time().timeName(obr_.time().startTime().value());
+            fileObr_.time().timeName(fileObr_.time().startTime().value());
 
         forAll(names_, i)
         {
@@ -49,7 +49,7 @@ void Foam::functionObjects::writeFiles::createFiles()
                 IFstream is(outputDir/(fName + ".dat"));
                 if (is.good())
                 {
-                    fName = fName + "_" + obr_.time().timeName();
+                    fName = fName + "_" + fileObr_.time().timeName();
                 }
 
                 filePtrs_.set(i, new OFstream(outputDir/(fName + ".dat")));
@@ -57,14 +57,13 @@ void Foam::functionObjects::writeFiles::createFiles()
                 initStream(filePtrs_[i]);
 
                 writeFileHeader(i);
-
             }
         }
     }
 }
 
 
-void Foam::functionObjects::writeFiles::resetNames(const wordList& names)
+void Foam::functionObjects::logFiles::resetNames(const wordList& names)
 {
     names_.clear();
     names_.append(names);
@@ -77,7 +76,7 @@ void Foam::functionObjects::writeFiles::resetNames(const wordList& names)
 }
 
 
-void Foam::functionObjects::writeFiles::resetName(const word& name)
+void Foam::functionObjects::logFiles::resetName(const word& name)
 {
     names_.clear();
     names_.append(name);
@@ -92,29 +91,13 @@ void Foam::functionObjects::writeFiles::resetName(const word& name)
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-Foam::functionObjects::writeFiles::writeFiles
+Foam::functionObjects::logFiles::logFiles
 (
-    const word& name,
-    const Time& time,
-    const dictionary& dict,
-    const word& prefix
-)
-:
-    writeFile(name, time, dict, prefix),
-    names_(),
-    filePtrs_()
-{}
-
-
-Foam::functionObjects::writeFiles::writeFiles
-(
-    const word& name,
     const objectRegistry& obr,
-    const dictionary& dict,
     const word& prefix
 )
 :
-    writeFile(name, obr, dict, prefix),
+    writeFile(obr, prefix),
     names_(),
     filePtrs_()
 {}
@@ -122,19 +105,19 @@ Foam::functionObjects::writeFiles::writeFiles
 
 // * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
-Foam::functionObjects::writeFiles::~writeFiles()
+Foam::functionObjects::logFiles::~logFiles()
 {}
 
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
-const Foam::wordList& Foam::functionObjects::writeFiles::names() const
+const Foam::wordList& Foam::functionObjects::logFiles::names() const
 {
     return names_;
 }
 
 
-Foam::OFstream& Foam::functionObjects::writeFiles::file()
+Foam::OFstream& Foam::functionObjects::logFiles::file()
 {
     if (!Pstream::master())
     {
@@ -161,7 +144,7 @@ Foam::OFstream& Foam::functionObjects::writeFiles::file()
 }
 
 
-Foam::PtrList<Foam::OFstream>& Foam::functionObjects::writeFiles::files()
+Foam::PtrList<Foam::OFstream>& Foam::functionObjects::logFiles::files()
 {
     if (!Pstream::master())
     {
@@ -174,7 +157,7 @@ Foam::PtrList<Foam::OFstream>& Foam::functionObjects::writeFiles::files()
 }
 
 
-Foam::OFstream& Foam::functionObjects::writeFiles::file(const label i)
+Foam::OFstream& Foam::functionObjects::logFiles::file(const label i)
 {
     if (!Pstream::master())
     {
@@ -194,7 +177,7 @@ Foam::OFstream& Foam::functionObjects::writeFiles::file(const label i)
 }
 
 
-bool Foam::functionObjects::writeFiles::write()
+bool Foam::functionObjects::logFiles::write()
 {
     createFiles();
 
diff --git a/src/OpenFOAM/db/functionObjects/writeFiles/writeFiles.H b/src/OpenFOAM/db/functionObjects/logFiles/logFiles.H
similarity index 78%
rename from src/OpenFOAM/db/functionObjects/writeFiles/writeFiles.H
rename to src/OpenFOAM/db/functionObjects/logFiles/logFiles.H
index 12667a11ea..466d483f3e 100644
--- a/src/OpenFOAM/db/functionObjects/writeFiles/writeFiles.H
+++ b/src/OpenFOAM/db/functionObjects/logFiles/logFiles.H
@@ -22,22 +22,23 @@ License
     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
 Class
-    Foam::functionObjects::writeFiles
+    Foam::functionObjects::logFiles
 
 Description
-    functionObject base class for writing files
+    functionObject base class for creating, maintaining and writing log
+    files e.g. integrated of averaged field data vs time.
 
 See also
     Foam::functionObject
-    Foam::OutputFilterFunctionObject
+    Foam::functionObjects::writeFile
 
 SourceFiles
-    functionObjectFiles.C
+    logFiles.C
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef functionObjects_writeFiles_H
-#define functionObjects_writeFiles_H
+#ifndef functionObjects_logFiles_H
+#define functionObjects_logFiles_H
 
 #include "writeFile.H"
 #include "OFstream.H"
@@ -51,14 +52,17 @@ namespace functionObjects
 {
 
 /*---------------------------------------------------------------------------*\
-                     Class writeFiles Declaration
+                     Class logFiles Declaration
 \*---------------------------------------------------------------------------*/
 
-class writeFiles
+class logFiles
 :
     public writeFile
 {
-    // Private data
+
+protected:
+
+    // Protected data
 
         //- File names
         wordList names_;
@@ -67,8 +71,6 @@ class writeFiles
         PtrList<OFstream> filePtrs_;
 
 
-protected:
-
     // Protected Member Functions
 
         //- Create the output file
@@ -80,38 +82,35 @@ protected:
         //- Reset the list of names to a single name entry
         virtual void resetName(const word& name);
 
+        //- File header information
+        virtual void writeFileHeader(const label i = 0) = 0;
+
+
+private:
+
+    // Private Member Functions
+
         //- Disallow default bitwise copy construct
-        writeFiles(const writeFiles&);
+        logFiles(const logFiles&);
 
         //- Disallow default bitwise assignment
-        void operator=(const writeFiles&);
+        void operator=(const logFiles&);
 
 
 public:
 
     // Constructors
 
-        //- Construct from name, Time, dictionary and prefix
-        writeFiles
+        //- Construct from objectRegistry and prefix
+        logFiles
         (
-            const word& name,
-            const Time& time,
-            const dictionary& dict,
-            const word& prefix
-        );
-
-        //- Construct from name, objectRegistry, dictionary and prefix
-        writeFiles
-        (
-            const word& name,
             const objectRegistry& obr,
-            const dictionary& dict,
             const word& prefix
         );
 
 
     //- Destructor
-    virtual ~writeFiles();
+    virtual ~logFiles();
 
 
     // Member Functions
@@ -119,12 +118,12 @@ public:
         //- Return const access to the names
         const wordList& names() const;
 
-        //- Return access to the file (if only 1)
-        OFstream& file();
-
         //- Return access to the files
         PtrList<OFstream>& files();
 
+        //- Return access to the file (if only 1)
+        OFstream& file();
+
         //- Return file 'i'
         OFstream& file(const label i);
 
diff --git a/src/OpenFOAM/db/functionObjects/writeFile/writeFile.C b/src/OpenFOAM/db/functionObjects/writeFile/writeFile.C
index d2a172d408..919b948b0d 100644
--- a/src/OpenFOAM/db/functionObjects/writeFile/writeFile.C
+++ b/src/OpenFOAM/db/functionObjects/writeFile/writeFile.C
@@ -26,7 +26,6 @@ License
 #include "writeFile.H"
 #include "Time.H"
 #include "polyMesh.H"
-#include "IOmanip.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
@@ -49,7 +48,7 @@ void Foam::functionObjects::writeFile::initStream(Ostream& os) const
 
 Foam::fileName Foam::functionObjects::writeFile::baseFileDir() const
 {
-    fileName baseDir = obr_.time().path();
+    fileName baseDir = fileObr_.time().path();
 
     if (Pstream::parRun())
     {
@@ -63,9 +62,9 @@ Foam::fileName Foam::functionObjects::writeFile::baseFileDir() const
     }
 
     // Append mesh name if not default region
-    if (isA<polyMesh>(obr_))
+    if (isA<polyMesh>(fileObr_))
     {
-        const polyMesh& mesh = refCast<const polyMesh>(obr_);
+        const polyMesh& mesh = refCast<const polyMesh>(fileObr_);
         if (mesh.name() != polyMesh::defaultRegion)
         {
             baseDir = baseDir/mesh.name();
@@ -78,14 +77,10 @@ Foam::fileName Foam::functionObjects::writeFile::baseFileDir() const
 
 Foam::fileName Foam::functionObjects::writeFile::baseTimeDir() const
 {
-    return baseFileDir()/prefix_/obr_.time().timeName();
+    return baseFileDir()/prefix_/fileObr_.time().timeName();
 }
 
 
-void Foam::functionObjects::writeFile::writeFileHeader(const label i)
-{}
-
-
 Foam::Omanip<int> Foam::functionObjects::writeFile::valueWidth
 (
     const label offset
@@ -99,26 +94,11 @@ Foam::Omanip<int> Foam::functionObjects::writeFile::valueWidth
 
 Foam::functionObjects::writeFile::writeFile
 (
-    const word& name,
-    const Time& runTime,
-    const dictionary& dict,
-    const word& prefix
-)
-:
-    regionFunctionObject(name, runTime, dict),
-    prefix_(prefix)
-{}
-
-
-Foam::functionObjects::writeFile::writeFile
-(
-    const word& name,
     const objectRegistry& obr,
-    const dictionary& dict,
     const word& prefix
 )
 :
-    regionFunctionObject(name, obr, dict),
+    fileObr_(obr),
     prefix_(prefix)
 {}
 
@@ -171,7 +151,7 @@ void Foam::functionObjects::writeFile::writeHeader
 
 void Foam::functionObjects::writeFile::writeTime(Ostream& os) const
 {
-    os  << setw(charWidth()) << obr_.time().timeName();
+    os  << setw(charWidth()) << fileObr_.time().timeName();
 }
 
 
diff --git a/src/OpenFOAM/db/functionObjects/writeFile/writeFile.H b/src/OpenFOAM/db/functionObjects/writeFile/writeFile.H
index 111a50a7f9..ccf6e0e3e4 100644
--- a/src/OpenFOAM/db/functionObjects/writeFile/writeFile.H
+++ b/src/OpenFOAM/db/functionObjects/writeFile/writeFile.H
@@ -28,19 +28,18 @@ Description
     functionObject base class for writing single files
 
 See also
-    Foam::regionFunctionObject
     Foam::functionObject
+    Foam::functionObjects::logFiles
 
 SourceFiles
-    functionObjectFile.C
+    writeFile.C
 
 \*---------------------------------------------------------------------------*/
 
 #ifndef functionObjects_writeFile_H
 #define functionObjects_writeFile_H
 
-#include "regionFunctionObject.H"
-#include "Time.H"
+#include "objectRegistry.H"
 #include "IOmanip.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@@ -55,34 +54,22 @@ namespace functionObjects
 \*---------------------------------------------------------------------------*/
 
 class writeFile
-:
-    public regionFunctionObject
 {
 
 protected:
 
     // Protected data
 
+        //- Reference to the region objectRegistry
+        const objectRegistry& fileObr_;
+
         //- Prefix
         const word prefix_;
 
 
-    // Protected Member Functions
+private:
 
-        //- Initialise the output stream for writing
-        virtual void initStream(Ostream& os) const;
-
-        //- Return the base directory for output
-        virtual fileName baseFileDir() const;
-
-        //- Return the base directory for the current time value
-        virtual fileName baseTimeDir() const;
-
-        //- File header information
-        virtual void writeFileHeader(const label i = 0);
-
-        //- Return the value width when writing to stream with optional offset
-        virtual Omanip<int> valueWidth(const label offset = 0) const;
+    // Private Member Functions
 
         //- Disallow default bitwise copy construct
         writeFile(const writeFile&);
@@ -102,31 +89,32 @@ public:
 
     // Constructors
 
-        //- Construct from name, Time, dictionary and prefix
+        //- Construct from objectRegistry and prefix
         writeFile
         (
-            const word& name,
-            const Time& t,
-            const dictionary& dict,
-            const word& prefix
-        );
-
-        //- Construct from name, objectRegistry, dictionary and prefix
-        writeFile
-        (
-            const word& name,
             const objectRegistry& obr,
-            const dictionary& dict,
             const word& prefix
         );
 
 
     //- Destructor
-    virtual ~writeFile();
+    ~writeFile();
 
 
     // Member Functions
 
+        //- Initialise the output stream for writing
+        void initStream(Ostream& os) const;
+
+        //- Return the base directory for output
+        fileName baseFileDir() const;
+
+        //- Return the base directory for the current time value
+        fileName baseTimeDir() const;
+
+        //- Return the value width when writing to stream with optional offset
+        Omanip<int> valueWidth(const label offset = 0) const;
+
         //- Write a commented string to stream
         void writeCommented(Ostream& os, const string& str) const;
 
diff --git a/src/functionObjects/field/fieldMinMax/fieldMinMax.C b/src/functionObjects/field/fieldMinMax/fieldMinMax.C
index 18e66003cb..94c4655345 100644
--- a/src/functionObjects/field/fieldMinMax/fieldMinMax.C
+++ b/src/functionObjects/field/fieldMinMax/fieldMinMax.C
@@ -103,7 +103,8 @@ Foam::functionObjects::fieldMinMax::fieldMinMax
     const dictionary& dict
 )
 :
-    writeFiles(name, runTime, dict, name),
+    regionFunctionObject(name, runTime, dict),
+    logFiles(obr_, name),
     location_(true),
     mode_(mdMag),
     fieldSet_()
@@ -129,7 +130,7 @@ Foam::functionObjects::fieldMinMax::~fieldMinMax()
 
 bool Foam::functionObjects::fieldMinMax::read(const dictionary& dict)
 {
-    writeFiles::read(dict);
+    regionFunctionObject::read(dict);
 
     location_ = dict.lookupOrDefault<Switch>("location", true);
 
@@ -148,7 +149,7 @@ bool Foam::functionObjects::fieldMinMax::execute()
 
 bool Foam::functionObjects::fieldMinMax::write()
 {
-    writeFiles::write();
+    logFiles::write();
 
     if (!location_) writeTime(file());
     Log << type() << " " << name() <<  " write:" << nl;
diff --git a/src/functionObjects/field/fieldMinMax/fieldMinMax.H b/src/functionObjects/field/fieldMinMax/fieldMinMax.H
index a024b61cbc..24a218e424 100644
--- a/src/functionObjects/field/fieldMinMax/fieldMinMax.H
+++ b/src/functionObjects/field/fieldMinMax/fieldMinMax.H
@@ -67,8 +67,8 @@ Usage
     Output data is written to the file \<timeDir\>/fieldMinMax.dat
 
 See also
-    Foam::functionObject
-    Foam::functionObjects::writeFiles
+    Foam::functionObjects::regionFunctionObject
+    Foam::functionObjects::logFiles
 
 SourceFiles
     fieldMinMax.C
@@ -78,7 +78,8 @@ SourceFiles
 #ifndef functionObjects_fieldMinMax_H
 #define functionObjects_fieldMinMax_H
 
-#include "writeFiles.H"
+#include "regionFunctionObject.H"
+#include "logFiles.H"
 #include "vector.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@@ -94,7 +95,8 @@ namespace functionObjects
 
 class fieldMinMax
 :
-    public writeFiles
+    public regionFunctionObject,
+    public logFiles
 {
 public:
 
diff --git a/src/functionObjects/field/fieldValues/fieldValue/fieldValue.C b/src/functionObjects/field/fieldValues/fieldValue/fieldValue.C
index 54731bb9ff..fac60d2f9c 100644
--- a/src/functionObjects/field/fieldValues/fieldValue/fieldValue.C
+++ b/src/functionObjects/field/fieldValues/fieldValue/fieldValue.C
@@ -49,7 +49,8 @@ Foam::functionObjects::fieldValue::fieldValue
     const word& valueType
 )
 :
-    writeFiles(name, runTime, dict, name),
+    regionFunctionObject(name, runTime, dict),
+    logFiles(obr_, name),
     dict_(dict),
     regionName_(word::null),
     resultDict_(fileName("name"), dictionary::null)
@@ -67,7 +68,8 @@ Foam::functionObjects::fieldValue::fieldValue
     const word& valueType
 )
 :
-    writeFiles(name, obr, dict, name),
+    regionFunctionObject(name, obr, dict),
+    logFiles(obr_, name),
     dict_(dict),
     regionName_(word::null),
     resultDict_(fileName("name"), dictionary::null)
@@ -88,7 +90,7 @@ Foam::functionObjects::fieldValue::~fieldValue()
 bool Foam::functionObjects::fieldValue::read(const dictionary& dict)
 {
     dict_ = dict;
-    writeFiles::read(dict);
+    regionFunctionObject::read(dict);
 
     dict.lookup("fields") >> fields_;
     dict.lookup("writeFields") >> writeFields_;
@@ -105,7 +107,7 @@ bool Foam::functionObjects::fieldValue::execute()
 
 bool Foam::functionObjects::fieldValue::write()
 {
-    writeFiles::write();
+    logFiles::write();
 
     Log << type() << " " << name() << " write:" << nl;
 
diff --git a/src/functionObjects/field/fieldValues/fieldValue/fieldValue.H b/src/functionObjects/field/fieldValues/fieldValue/fieldValue.H
index cad2b65490..c6331b5abb 100644
--- a/src/functionObjects/field/fieldValues/fieldValue/fieldValue.H
+++ b/src/functionObjects/field/fieldValues/fieldValue/fieldValue.H
@@ -30,6 +30,11 @@ Group
 Description
     Base class for field value -based function objects.
 
+See also
+    Foam::functionObject
+    Foam::functionObjects::regionFunctionObject
+    Foam::functionObjects::logFiles
+
 SourceFiles
     fieldValue.C
 
@@ -38,7 +43,8 @@ SourceFiles
 #ifndef functionObjects_fieldValue_H
 #define functionObjects_fieldValue_H
 
-#include "writeFiles.H"
+#include "regionFunctionObject.H"
+#include "logFiles.H"
 #include "Switch.H"
 #include "Field.H"
 
@@ -59,7 +65,8 @@ namespace functionObjects
 
 class fieldValue
 :
-    public writeFiles
+    public regionFunctionObject,
+    public logFiles
 {
 
 protected:
diff --git a/src/functionObjects/field/fieldValues/fieldValueDelta/fieldValueDelta.C b/src/functionObjects/field/fieldValues/fieldValueDelta/fieldValueDelta.C
index 5c0b22c3e9..3b243f87b5 100644
--- a/src/functionObjects/field/fieldValues/fieldValueDelta/fieldValueDelta.C
+++ b/src/functionObjects/field/fieldValues/fieldValueDelta/fieldValueDelta.C
@@ -106,7 +106,8 @@ Foam::functionObjects::fieldValues::fieldValueDelta::fieldValueDelta
     const dictionary& dict
 )
 :
-    writeFiles(name, runTime, dict, name),
+    regionFunctionObject(name, runTime, dict),
+    logFiles(obr_, name),
     operation_(opSubtract),
     region1Ptr_(nullptr),
     region2Ptr_(nullptr)
@@ -135,7 +136,7 @@ bool Foam::functionObjects::fieldValues::fieldValueDelta::read
     const dictionary& dict
 )
 {
-    writeFiles::read(dict);
+    regionFunctionObject::read(dict);
 
     region1Ptr_.reset
     (
@@ -166,7 +167,7 @@ bool Foam::functionObjects::fieldValues::fieldValueDelta::read
 
 bool Foam::functionObjects::fieldValues::fieldValueDelta::write()
 {
-    writeFiles::write();
+    logFiles::write();
 
     region1Ptr_->write();
     region2Ptr_->write();
diff --git a/src/functionObjects/field/fieldValues/fieldValueDelta/fieldValueDelta.H b/src/functionObjects/field/fieldValues/fieldValueDelta/fieldValueDelta.H
index 127efb9753..d31620c97f 100644
--- a/src/functionObjects/field/fieldValues/fieldValueDelta/fieldValueDelta.H
+++ b/src/functionObjects/field/fieldValues/fieldValueDelta/fieldValueDelta.H
@@ -65,7 +65,10 @@ Usage
     \endplaintable
 
 See also
-    Foam::fieldValue
+    Foam::functionObject
+    Foam::functionObject::fieldValue
+    Foam::functionObjects::regionFunctionObject
+    Foam::functionObjects::logFiles
 
 SourceFiles
     fieldValueDelta.C
@@ -75,7 +78,8 @@ SourceFiles
 #ifndef functionObjects_fieldValueDelta_H
 #define functionObjects_fieldValueDelta_H
 
-#include "writeFiles.H"
+#include "regionFunctionObject.H"
+#include "logFiles.H"
 #include "fieldValue.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@@ -93,7 +97,8 @@ namespace fieldValues
 
 class fieldValueDelta
 :
-    public writeFiles
+    public regionFunctionObject,
+    public logFiles
 {
 public:
         //- Operation type enumeration
diff --git a/src/functionObjects/field/histogram/histogram.C b/src/functionObjects/field/histogram/histogram.C
index f8e015020d..6ccc0dbaf4 100644
--- a/src/functionObjects/field/histogram/histogram.C
+++ b/src/functionObjects/field/histogram/histogram.C
@@ -50,7 +50,7 @@ void Foam::functionObjects::histogram::writeGraph
 {
     const wordList fieldNames(1, fieldName);
 
-    fileName outputPath = baseTimeDir();
+    fileName outputPath = file_.baseTimeDir();
     mkDir(outputPath);
     OFstream graphFile
     (
@@ -75,7 +75,8 @@ Foam::functionObjects::histogram::histogram
     const dictionary& dict
 )
 :
-    writeFile(name, runTime, dict, name)
+    regionFunctionObject(name, runTime, dict),
+    file_(obr_, name)
 {
     if (!isA<fvMesh>(obr_))
     {
diff --git a/src/functionObjects/field/histogram/histogram.H b/src/functionObjects/field/histogram/histogram.H
index 0767444369..9972e7fd03 100644
--- a/src/functionObjects/field/histogram/histogram.H
+++ b/src/functionObjects/field/histogram/histogram.H
@@ -59,6 +59,7 @@ Usage
 
 See also
     Foam::functionObject
+    Foam::functionObjects::regionFunctionObject
     Foam::functionObjects::writeFile
 
 SourceFiles
@@ -69,8 +70,9 @@ SourceFiles
 #ifndef functionObjects_histogram_H
 #define functionObjects_histogram_H
 
-#include "writer.H"
+#include "regionFunctionObject.H"
 #include "writeFile.H"
+#include "writer.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -85,10 +87,12 @@ namespace functionObjects
 
 class histogram
 :
-    public writeFile
+    public regionFunctionObject
 {
     // Private data
 
+        writeFile file_;
+
         //- Name of field
         word fieldName_;
 
diff --git a/src/functionObjects/field/regionSizeDistribution/regionSizeDistribution.C b/src/functionObjects/field/regionSizeDistribution/regionSizeDistribution.C
index 95bab35c13..f6bd360ef3 100644
--- a/src/functionObjects/field/regionSizeDistribution/regionSizeDistribution.C
+++ b/src/functionObjects/field/regionSizeDistribution/regionSizeDistribution.C
@@ -74,7 +74,7 @@ void Foam::functionObjects::regionSizeDistribution::writeGraph
 {
     const wordList valNames(1, valueName);
 
-    fileName outputPath = baseTimeDir();
+    fileName outputPath = file_.baseTimeDir();
     mkDir(outputPath);
 
     OFstream str(outputPath/formatterPtr_().getFileName(coords, valNames));
@@ -330,7 +330,8 @@ Foam::functionObjects::regionSizeDistribution::regionSizeDistribution
     const dictionary& dict
 )
 :
-    writeFile(name, runTime, dict, name),
+    regionFunctionObject(name, runTime, dict),
+    file_(obr_, name),
     alphaName_(dict.lookup("field")),
     patchNames_(dict.lookup("patches"))
 {
diff --git a/src/functionObjects/field/regionSizeDistribution/regionSizeDistribution.H b/src/functionObjects/field/regionSizeDistribution/regionSizeDistribution.H
index f3a7b53a0c..52d45ef292 100644
--- a/src/functionObjects/field/regionSizeDistribution/regionSizeDistribution.H
+++ b/src/functionObjects/field/regionSizeDistribution/regionSizeDistribution.H
@@ -96,6 +96,7 @@ Usage
 
 See also
     Foam::functionObject
+    Foam::functionObjects::regionFunctionObject
     Foam::functionObjects::writeFile
 
 SourceFiles
@@ -106,6 +107,7 @@ SourceFiles
 #ifndef functionObjects_regionSizeDistribution_H
 #define functionObjects_regionSizeDistribution_H
 
+#include "regionFunctionObject.H"
 #include "writeFile.H"
 #include "writer.H"
 #include "Map.H"
@@ -130,10 +132,12 @@ namespace functionObjects
 
 class regionSizeDistribution
 :
-    public writeFile
+    public regionFunctionObject
 {
     // Private data
 
+        writeFile file_;
+
         //- Name of field
         word alphaName_;
 
diff --git a/src/functionObjects/field/wallHeatFlux/wallHeatFlux.C b/src/functionObjects/field/wallHeatFlux/wallHeatFlux.C
index 142d3d739a..9f42c56491 100644
--- a/src/functionObjects/field/wallHeatFlux/wallHeatFlux.C
+++ b/src/functionObjects/field/wallHeatFlux/wallHeatFlux.C
@@ -102,7 +102,8 @@ Foam::functionObjects::wallHeatFlux::wallHeatFlux
     const dictionary& dict
 )
 :
-    writeFiles(name, runTime, dict, name),
+    regionFunctionObject(name, runTime, dict),
+    logFiles(obr_, name),
     patchSet_()
 {
     if (!isA<fvMesh>(obr_))
@@ -147,7 +148,7 @@ Foam::functionObjects::wallHeatFlux::~wallHeatFlux()
 
 bool Foam::functionObjects::wallHeatFlux::read(const dictionary& dict)
 {
-    writeFiles::read(dict);
+    regionFunctionObject::read(dict);
 
     const fvMesh& mesh = refCast<const fvMesh>(obr_);
     const polyBoundaryMesh& pbm = mesh.boundaryMesh();
@@ -237,7 +238,7 @@ bool Foam::functionObjects::wallHeatFlux::execute()
 
 bool Foam::functionObjects::wallHeatFlux::write()
 {
-    writeFiles::write();
+    logFiles::write();
 
     const volScalarField& wallHeatFlux =
         obr_.lookupObject<volScalarField>(type());
diff --git a/src/functionObjects/field/wallHeatFlux/wallHeatFlux.H b/src/functionObjects/field/wallHeatFlux/wallHeatFlux.H
index 505d019669..4cb46bea23 100644
--- a/src/functionObjects/field/wallHeatFlux/wallHeatFlux.H
+++ b/src/functionObjects/field/wallHeatFlux/wallHeatFlux.H
@@ -54,7 +54,8 @@ Usage
 
 See also
     Foam::functionObject
-    Foam::functionObjects::writeFiles
+    Foam::functionObjects::regionFunctionObject
+    Foam::functionObjects::logFiles
     Foam::functionObjects::pressureTools
     Foam::functionObjects::timeControl
 
@@ -66,7 +67,8 @@ SourceFiles
 #ifndef functionObjects_wallHeatFlux_H
 #define functionObjects_wallHeatFlux_H
 
-#include "writeFiles.H"
+#include "regionFunctionObject.H"
+#include "logFiles.H"
 #include "volFieldsFwd.H"
 #include "surfaceFieldsFwd.H"
 #include "HashSet.H"
@@ -89,8 +91,10 @@ namespace functionObjects
 
 class wallHeatFlux
 :
-    public writeFiles
+    public regionFunctionObject,
+    public logFiles
 {
+
 protected:
 
     // Protected data
diff --git a/src/functionObjects/field/wallShearStress/wallShearStress.C b/src/functionObjects/field/wallShearStress/wallShearStress.C
index a31714a406..b9427c6a5f 100644
--- a/src/functionObjects/field/wallShearStress/wallShearStress.C
+++ b/src/functionObjects/field/wallShearStress/wallShearStress.C
@@ -89,7 +89,8 @@ Foam::functionObjects::wallShearStress::wallShearStress
     const dictionary& dict
 )
 :
-    writeFiles(name, runTime, dict, name),
+    regionFunctionObject(name, runTime, dict),
+    logFiles(obr_, name),
     patchSet_()
 {
     if (!isA<fvMesh>(obr_))
@@ -139,7 +140,7 @@ Foam::functionObjects::wallShearStress::~wallShearStress()
 
 bool Foam::functionObjects::wallShearStress::read(const dictionary& dict)
 {
-    writeFiles::read(dict);
+    regionFunctionObject::read(dict);
 
     const fvMesh& mesh = refCast<const fvMesh>(obr_);
     const polyBoundaryMesh& pbm = mesh.boundaryMesh();
@@ -236,7 +237,7 @@ bool Foam::functionObjects::wallShearStress::execute()
 
 bool Foam::functionObjects::wallShearStress::write()
 {
-    writeFiles::write();
+    logFiles::write();
 
     const volVectorField& wallShearStress =
         obr_.lookupObject<volVectorField>(type());
diff --git a/src/functionObjects/field/wallShearStress/wallShearStress.H b/src/functionObjects/field/wallShearStress/wallShearStress.H
index 5836f08b86..f63ffa5542 100644
--- a/src/functionObjects/field/wallShearStress/wallShearStress.H
+++ b/src/functionObjects/field/wallShearStress/wallShearStress.H
@@ -65,7 +65,8 @@ Usage
 
 See also
     Foam::functionObject
-    Foam::functionObjects::writeFiles
+    Foam::functionObjects::regionFunctionObject
+    Foam::functionObjects::logFiles
     Foam::functionObjects::pressureTools
     Foam::functionObjects::timeControl
 
@@ -77,7 +78,8 @@ SourceFiles
 #ifndef functionObjects_wallShearStress_H
 #define functionObjects_wallShearStress_H
 
-#include "writeFiles.H"
+#include "regionFunctionObject.H"
+#include "logFiles.H"
 #include "volFieldsFwd.H"
 #include "HashSet.H"
 
@@ -98,8 +100,10 @@ namespace functionObjects
 
 class wallShearStress
 :
-    public writeFiles
+    public regionFunctionObject,
+    public logFiles
 {
+
 protected:
 
     // Protected data
diff --git a/src/functionObjects/field/yPlus/yPlus.C b/src/functionObjects/field/yPlus/yPlus.C
index e9db697e78..a2dc994da1 100644
--- a/src/functionObjects/field/yPlus/yPlus.C
+++ b/src/functionObjects/field/yPlus/yPlus.C
@@ -121,7 +121,8 @@ Foam::functionObjects::yPlus::yPlus
     const dictionary& dict
 )
 :
-    writeFiles(name, runTime, dict, name)
+    regionFunctionObject(name, runTime, dict),
+    logFiles(obr_, name)
 {
     if (!isA<fvMesh>(obr_))
     {
@@ -164,7 +165,7 @@ Foam::functionObjects::yPlus::~yPlus()
 
 bool Foam::functionObjects::yPlus::read(const dictionary& dict)
 {
-    writeFiles::read(dict);
+    regionFunctionObject::read(dict);
 
     return true;
 }
@@ -208,7 +209,7 @@ bool Foam::functionObjects::yPlus::write()
 
     yPlus.write();
 
-    writeFiles::write();
+    logFiles::write();
 
     const volScalarField::Boundary& yPlusBf = yPlus.boundaryField();
 
diff --git a/src/functionObjects/field/yPlus/yPlus.H b/src/functionObjects/field/yPlus/yPlus.H
index 45696b8300..e8435189ec 100644
--- a/src/functionObjects/field/yPlus/yPlus.H
+++ b/src/functionObjects/field/yPlus/yPlus.H
@@ -33,7 +33,8 @@ Description
 
 See also
     Foam::functionObject
-    Foam::functionObjects::writeFiles
+    Foam::functionObjects::regionFunctionObject
+    Foam::functionObjects::logFiles
     Foam::functionObjects::timeControl
 
 SourceFiles
@@ -44,7 +45,8 @@ SourceFiles
 #ifndef functionObjects_yPlus_H
 #define functionObjects_yPlus_H
 
-#include "writeFiles.H"
+#include "regionFunctionObject.H"
+#include "logFiles.H"
 #include "volFieldsFwd.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@@ -65,7 +67,8 @@ namespace functionObjects
 
 class yPlus
 :
-    public writeFiles
+    public regionFunctionObject,
+    public logFiles
 {
     // Private Member Functions
 
diff --git a/src/functionObjects/forces/forceCoeffs/forceCoeffs.C b/src/functionObjects/forces/forceCoeffs/forceCoeffs.C
index 64d72517e6..cf6d258bfa 100644
--- a/src/functionObjects/forces/forceCoeffs/forceCoeffs.C
+++ b/src/functionObjects/forces/forceCoeffs/forceCoeffs.C
@@ -179,7 +179,7 @@ bool Foam::functionObjects::forceCoeffs::write()
 
     if (Pstream::master())
     {
-        writeFiles::write();
+        logFiles::write();
 
         scalar pDyn = 0.5*rhoRef_*magUInf_*magUInf_;
 
diff --git a/src/functionObjects/forces/forces/forces.C b/src/functionObjects/forces/forces/forces.C
index 6b208963d5..8f33033733 100644
--- a/src/functionObjects/forces/forces/forces.C
+++ b/src/functionObjects/forces/forces/forces.C
@@ -529,7 +529,8 @@ Foam::functionObjects::forces::forces
     const dictionary& dict
 )
 :
-    writeFiles(name, runTime, dict, name),
+    regionFunctionObject(name, runTime, dict),
+    logFiles(obr_, name),
     force_(3),
     moment_(3),
     patchSet_(),
@@ -569,7 +570,8 @@ Foam::functionObjects::forces::forces
     const dictionary& dict
 )
 :
-    writeFiles(name, obr, dict, name),
+    regionFunctionObject(name, obr, dict),
+    logFiles(obr_, name),
     force_(3),
     moment_(3),
     patchSet_(),
@@ -612,7 +614,7 @@ Foam::functionObjects::forces::~forces()
 
 bool Foam::functionObjects::forces::read(const dictionary& dict)
 {
-    writeFiles::read(dict);
+    regionFunctionObject::read(dict);
 
     initialised_ = false;
 
@@ -909,7 +911,7 @@ bool Foam::functionObjects::forces::write()
 
     if (Pstream::master())
     {
-        writeFiles::write();
+        logFiles::write();
 
         writeForces();
 
diff --git a/src/functionObjects/forces/forces/forces.H b/src/functionObjects/forces/forces/forces.H
index 223c4cd632..a3ecac8f16 100644
--- a/src/functionObjects/forces/forces/forces.H
+++ b/src/functionObjects/forces/forces/forces.H
@@ -101,7 +101,8 @@ Note
 
 See also
     Foam::functionObject
-    Foam::functionObjects::writeFiles
+    Foam::functionObjects::regionFunctionObject
+    Foam::functionObjects::logFiles
     Foam::functionObjects::timeControl
     Foam::forceCoeffs
 
@@ -113,7 +114,8 @@ SourceFiles
 #ifndef functionObjects_forces_H
 #define functionObjects_forces_H
 
-#include "writeFiles.H"
+#include "regionFunctionObject.H"
+#include "logFiles.H"
 #include "coordinateSystem.H"
 #include "volFieldsFwd.H"
 #include "HashSet.H"
@@ -131,8 +133,10 @@ namespace functionObjects
 
 class forces
 :
-    public writeFiles
+    public regionFunctionObject,
+    public logFiles
 {
+
 protected:
 
     // Protected data
diff --git a/src/functionObjects/lagrangian/cloudInfo/cloudInfo.C b/src/functionObjects/lagrangian/cloudInfo/cloudInfo.C
index f2e8639f8c..f8cb1dfb71 100644
--- a/src/functionObjects/lagrangian/cloudInfo/cloudInfo.C
+++ b/src/functionObjects/lagrangian/cloudInfo/cloudInfo.C
@@ -25,6 +25,8 @@ License
 
 #include "cloudInfo.H"
 #include "kinematicCloud.H"
+#include "dictionary.H"
+#include "PstreamReduceOps.H"
 #include "addToRunTimeSelectionTable.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
@@ -66,7 +68,8 @@ Foam::functionObjects::cloudInfo::cloudInfo
     const dictionary& dict
 )
 :
-    writeFiles(name, runTime, dict, name)
+    regionFunctionObject(name, runTime, dict),
+    logFiles(obr_, name)
 {
     read(dict);
 }
@@ -82,7 +85,9 @@ Foam::functionObjects::cloudInfo::~cloudInfo()
 
 bool Foam::functionObjects::cloudInfo::read(const dictionary& dict)
 {
-    writeFiles::resetNames(dict.lookup("clouds"));
+    regionFunctionObject::read(dict);
+
+    logFiles::resetNames(dict.lookup("clouds"));
 
     Info<< type() << " " << name() << ": ";
     if (names().size())
@@ -111,7 +116,7 @@ bool Foam::functionObjects::cloudInfo::execute()
 
 bool Foam::functionObjects::cloudInfo::write()
 {
-    writeFiles::write();
+    logFiles::write();
 
     forAll(names(), i)
     {
diff --git a/src/functionObjects/lagrangian/cloudInfo/cloudInfo.H b/src/functionObjects/lagrangian/cloudInfo/cloudInfo.H
index 564406dde5..a2720ea4e5 100644
--- a/src/functionObjects/lagrangian/cloudInfo/cloudInfo.H
+++ b/src/functionObjects/lagrangian/cloudInfo/cloudInfo.H
@@ -61,7 +61,8 @@ Usage
 
 See also
     Foam::functionObject
-    Foam::functionObjects::writeFiles
+    Foam::functionObjects::regionFunctionObject
+    Foam::functionObjects::logFiles
 
 SourceFiles
     cloudInfo.C
@@ -71,7 +72,8 @@ SourceFiles
 #ifndef functionObjects_cloudInfo_H
 #define functionObjects_cloudInfo_H
 
-#include "writeFiles.H"
+#include "regionFunctionObject.H"
+#include "logFiles.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -86,7 +88,8 @@ namespace functionObjects
 
 class cloudInfo
 :
-    public writeFiles
+    public regionFunctionObject,
+    public logFiles
 {
 protected:
 
diff --git a/src/functionObjects/utilities/residuals/residuals.C b/src/functionObjects/utilities/residuals/residuals.C
index 17e1cb1a76..b86454a8a7 100644
--- a/src/functionObjects/utilities/residuals/residuals.C
+++ b/src/functionObjects/utilities/residuals/residuals.C
@@ -53,7 +53,8 @@ Foam::functionObjects::residuals::residuals
     const dictionary& dict
 )
 :
-    writeFiles(name, runTime, dict, name),
+    regionFunctionObject(name, runTime, dict),
+    logFiles(obr_, name),
     fieldSet_()
 {
     if (!isA<fvMesh>(obr_))
@@ -77,6 +78,8 @@ Foam::functionObjects::residuals::~residuals()
 
 bool Foam::functionObjects::residuals::read(const dictionary& dict)
 {
+    regionFunctionObject::read(dict);
+
     dict.lookup("fields") >> fieldSet_;
 
     return true;
@@ -114,7 +117,7 @@ bool Foam::functionObjects::residuals::execute()
 
 bool Foam::functionObjects::residuals::write()
 {
-    writeFiles::write();
+    logFiles::write();
 
     if (Pstream::master())
     {
diff --git a/src/functionObjects/utilities/residuals/residuals.H b/src/functionObjects/utilities/residuals/residuals.H
index 92b23ddc6d..0bd5972712 100644
--- a/src/functionObjects/utilities/residuals/residuals.H
+++ b/src/functionObjects/utilities/residuals/residuals.H
@@ -51,7 +51,8 @@ Description
 
 See also
     Foam::functionObject
-    Foam::functionObjects::writeFiles
+    Foam::functionObjects::regionFunctionObject
+    Foam::functionObjects::logFiles
     Foam::functionObjects::timeControl
 
 SourceFiles
@@ -62,7 +63,8 @@ SourceFiles
 #ifndef functionObjects_residuals_H
 #define functionObjects_residuals_H
 
-#include "writeFiles.H"
+#include "regionFunctionObject.H"
+#include "logFiles.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -77,7 +79,8 @@ namespace functionObjects
 
 class residuals
 :
-    public writeFiles
+    public regionFunctionObject,
+    public logFiles
 {
 protected: