diff --git a/src/cpu/VirtualFluidsCore/Grid/BasicCalculator.cpp b/src/cpu/VirtualFluidsCore/Grid/BasicCalculator.cpp
index 42985c3401acf9dc5892b3c7618599e0be8066c1..5da7a3b272c56611a771ba0830278b6493b67374 100644
--- a/src/cpu/VirtualFluidsCore/Grid/BasicCalculator.cpp
+++ b/src/cpu/VirtualFluidsCore/Grid/BasicCalculator.cpp
@@ -1,3 +1,36 @@
+//=======================================================================================
+// ____ ____ __ ______ __________ __ __ __ __
+// \ \ | | | | | _ \ |___ ___| | | | | / \ | |
+// \ \ | | | | | |_) | | | | | | | / \ | |
+// \ \ | | | | | _ / | | | | | | / /\ \ | |
+// \ \ | | | | | | \ \ | | | \__/ | / ____ \ | |____
+// \ \ | | |__| |__| \__\ |__| \________/ /__/ \__\ |_______|
+// \ \ | | ________________________________________________________________
+// \ \ | | | ______________________________________________________________|
+// \ \| | | | __ __ __ __ ______ _______
+// \ | | |_____ | | | | | | | | | _ \ / _____)
+// \ | | _____| | | | | | | | | | | \ \ \_______
+// \ | | | | |_____ | \_/ | | | | |_/ / _____ |
+// \ _____| |__| |________| \_______/ |__| |______/ (_______/
+//
+// This file is part of VirtualFluids. VirtualFluids is free software: you can
+// redistribute it and/or modify it under the terms of the GNU General Public
+// License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// VirtualFluids is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with VirtualFluids (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
+//
+//! \file BasicCalculator.cpp
+//! \ingroup Grid
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#include "BasicCalculator.h"
#include "Block3D.h"
diff --git a/src/cpu/VirtualFluidsCore/Grid/BasicCalculator.h b/src/cpu/VirtualFluidsCore/Grid/BasicCalculator.h
index b77ac017f8a62d085bcd6546c36b9fcd8dd1f57f..0e681746156f7cbbec5216f7eb0bb10fe8fa5c07 100644
--- a/src/cpu/VirtualFluidsCore/Grid/BasicCalculator.h
+++ b/src/cpu/VirtualFluidsCore/Grid/BasicCalculator.h
@@ -1,3 +1,36 @@
+//=======================================================================================
+// ____ ____ __ ______ __________ __ __ __ __
+// \ \ | | | | | _ \ |___ ___| | | | | / \ | |
+// \ \ | | | | | |_) | | | | | | | / \ | |
+// \ \ | | | | | _ / | | | | | | / /\ \ | |
+// \ \ | | | | | | \ \ | | | \__/ | / ____ \ | |____
+// \ \ | | |__| |__| \__\ |__| \________/ /__/ \__\ |_______|
+// \ \ | | ________________________________________________________________
+// \ \ | | | ______________________________________________________________|
+// \ \| | | | __ __ __ __ ______ _______
+// \ | | |_____ | | | | | | | | | _ \ / _____)
+// \ | | _____| | | | | | | | | | | \ \ \_______
+// \ | | | | |_____ | \_/ | | | | |_/ / _____ |
+// \ _____| |__| |________| \_______/ |__| |______/ (_______/
+//
+// This file is part of VirtualFluids. VirtualFluids is free software: you can
+// redistribute it and/or modify it under the terms of the GNU General Public
+// License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// VirtualFluids is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with VirtualFluids (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
+//
+//! \file BasicCalculator.h
+//! \ingroup Grid
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#ifndef BasicCalculator_h__
#define BasicCalculator_h__
diff --git a/src/cpu/VirtualFluidsCore/Grid/Block3D.cpp b/src/cpu/VirtualFluidsCore/Grid/Block3D.cpp
index 05c0b78520b8dad1885e89d28bf0a38dd7a300b1..b9381a93575ab60a016f01bfbf596a32829fb7fd 100644
--- a/src/cpu/VirtualFluidsCore/Grid/Block3D.cpp
+++ b/src/cpu/VirtualFluidsCore/Grid/Block3D.cpp
@@ -1,3 +1,36 @@
+//=======================================================================================
+// ____ ____ __ ______ __________ __ __ __ __
+// \ \ | | | | | _ \ |___ ___| | | | | / \ | |
+// \ \ | | | | | |_) | | | | | | | / \ | |
+// \ \ | | | | | _ / | | | | | | / /\ \ | |
+// \ \ | | | | | | \ \ | | | \__/ | / ____ \ | |____
+// \ \ | | |__| |__| \__\ |__| \________/ /__/ \__\ |_______|
+// \ \ | | ________________________________________________________________
+// \ \ | | | ______________________________________________________________|
+// \ \| | | | __ __ __ __ ______ _______
+// \ | | |_____ | | | | | | | | | _ \ / _____)
+// \ | | _____| | | | | | | | | | | \ \ \_______
+// \ | | | | |_____ | \_/ | | | | |_/ / _____ |
+// \ _____| |__| |________| \_______/ |__| |______/ (_______/
+//
+// This file is part of VirtualFluids. VirtualFluids is free software: you can
+// redistribute it and/or modify it under the terms of the GNU General Public
+// License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// VirtualFluids is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with VirtualFluids (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
+//
+//! \file Block3D.cpp
+//! \ingroup Grid
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#include "Block3D.h"
#include "Grid3DSystem.h"
diff --git a/src/cpu/VirtualFluidsCore/Grid/Block3D.h b/src/cpu/VirtualFluidsCore/Grid/Block3D.h
index 79a9407171c290ed104295772025007372bed6bd..674517f187e61bc29daa753464f8b6c97525aa27 100644
--- a/src/cpu/VirtualFluidsCore/Grid/Block3D.h
+++ b/src/cpu/VirtualFluidsCore/Grid/Block3D.h
@@ -1,3 +1,36 @@
+//=======================================================================================
+// ____ ____ __ ______ __________ __ __ __ __
+// \ \ | | | | | _ \ |___ ___| | | | | / \ | |
+// \ \ | | | | | |_) | | | | | | | / \ | |
+// \ \ | | | | | _ / | | | | | | / /\ \ | |
+// \ \ | | | | | | \ \ | | | \__/ | / ____ \ | |____
+// \ \ | | |__| |__| \__\ |__| \________/ /__/ \__\ |_______|
+// \ \ | | ________________________________________________________________
+// \ \ | | | ______________________________________________________________|
+// \ \| | | | __ __ __ __ ______ _______
+// \ | | |_____ | | | | | | | | | _ \ / _____)
+// \ | | _____| | | | | | | | | | | \ \ \_______
+// \ | | | | |_____ | \_/ | | | | |_/ / _____ |
+// \ _____| |__| |________| \_______/ |__| |______/ (_______/
+//
+// This file is part of VirtualFluids. VirtualFluids is free software: you can
+// redistribute it and/or modify it under the terms of the GNU General Public
+// License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// VirtualFluids is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with VirtualFluids (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
+//
+//! \file Block3D.h
+//! \ingroup Grid
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#ifndef BLOCK3D_H
#define BLOCK3D_H
@@ -10,6 +43,7 @@ class Block3DConnector;
class LBMKernel;
class ILBMKernel;
+//! A class implements a block structure
class Block3D
{
public:
diff --git a/src/cpu/VirtualFluidsCore/Grid/Calculator.cpp b/src/cpu/VirtualFluidsCore/Grid/Calculator.cpp
index 0e8916073231c76949e6fba754d27f83995338f6..8155e33aedbda737bc5cb9ff9dd885dc843b9a70 100644
--- a/src/cpu/VirtualFluidsCore/Grid/Calculator.cpp
+++ b/src/cpu/VirtualFluidsCore/Grid/Calculator.cpp
@@ -1,3 +1,36 @@
+//=======================================================================================
+// ____ ____ __ ______ __________ __ __ __ __
+// \ \ | | | | | _ \ |___ ___| | | | | / \ | |
+// \ \ | | | | | |_) | | | | | | | / \ | |
+// \ \ | | | | | _ / | | | | | | / /\ \ | |
+// \ \ | | | | | | \ \ | | | \__/ | / ____ \ | |____
+// \ \ | | |__| |__| \__\ |__| \________/ /__/ \__\ |_______|
+// \ \ | | ________________________________________________________________
+// \ \ | | | ______________________________________________________________|
+// \ \| | | | __ __ __ __ ______ _______
+// \ | | |_____ | | | | | | | | | _ \ / _____)
+// \ | | _____| | | | | | | | | | | \ \ \_______
+// \ | | | | |_____ | \_/ | | | | |_/ / _____ |
+// \ _____| |__| |________| \_______/ |__| |______/ (_______/
+//
+// This file is part of VirtualFluids. VirtualFluids is free software: you can
+// redistribute it and/or modify it under the terms of the GNU General Public
+// License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// VirtualFluids is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with VirtualFluids (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
+//
+//! \file Calculator.cpp
+//! \ingroup Grid
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#include "Calculator.h"
#include "Grid3D.h"
diff --git a/src/cpu/VirtualFluidsCore/Grid/Calculator.h b/src/cpu/VirtualFluidsCore/Grid/Calculator.h
index ab266aaa20667cabb5e9c72b6f36e7bf25ad03a5..dfa1fabae8b17790166e4fe5b9e5d9fea8f5a745 100644
--- a/src/cpu/VirtualFluidsCore/Grid/Calculator.h
+++ b/src/cpu/VirtualFluidsCore/Grid/Calculator.h
@@ -1,3 +1,36 @@
+//=======================================================================================
+// ____ ____ __ ______ __________ __ __ __ __
+// \ \ | | | | | _ \ |___ ___| | | | | / \ | |
+// \ \ | | | | | |_) | | | | | | | / \ | |
+// \ \ | | | | | _ / | | | | | | / /\ \ | |
+// \ \ | | | | | | \ \ | | | \__/ | / ____ \ | |____
+// \ \ | | |__| |__| \__\ |__| \________/ /__/ \__\ |_______|
+// \ \ | | ________________________________________________________________
+// \ \ | | | ______________________________________________________________|
+// \ \| | | | __ __ __ __ ______ _______
+// \ | | |_____ | | | | | | | | | _ \ / _____)
+// \ | | _____| | | | | | | | | | | \ \ \_______
+// \ | | | | |_____ | \_/ | | | | |_/ / _____ |
+// \ _____| |__| |________| \_______/ |__| |______/ (_______/
+//
+// This file is part of VirtualFluids. VirtualFluids is free software: you can
+// redistribute it and/or modify it under the terms of the GNU General Public
+// License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// VirtualFluids is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with VirtualFluids (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
+//
+//! \file Calculator.h
+//! \ingroup Grid
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#ifndef CALCULATOR_H
#define CALCULATOR_H
@@ -11,8 +44,7 @@ class Block3DConnector;
class CoProcessor;
//! \class Calculator
-//! \brief Abstract class for main calculation loop
-//! \author Konstantin Kutscher
+//! \brief A base class for main calculation loop
class Calculator
{
diff --git a/src/cpu/VirtualFluidsCore/Grid/Grid3D.cpp b/src/cpu/VirtualFluidsCore/Grid/Grid3D.cpp
index d83e22be30296621fec256c5124f3412ff97d9c8..60d8636206e6ceffa49e8fc61aa5eff201fe2abe 100644
--- a/src/cpu/VirtualFluidsCore/Grid/Grid3D.cpp
+++ b/src/cpu/VirtualFluidsCore/Grid/Grid3D.cpp
@@ -1,3 +1,36 @@
+//=======================================================================================
+// ____ ____ __ ______ __________ __ __ __ __
+// \ \ | | | | | _ \ |___ ___| | | | | / \ | |
+// \ \ | | | | | |_) | | | | | | | / \ | |
+// \ \ | | | | | _ / | | | | | | / /\ \ | |
+// \ \ | | | | | | \ \ | | | \__/ | / ____ \ | |____
+// \ \ | | |__| |__| \__\ |__| \________/ /__/ \__\ |_______|
+// \ \ | | ________________________________________________________________
+// \ \ | | | ______________________________________________________________|
+// \ \| | | | __ __ __ __ ______ _______
+// \ | | |_____ | | | | | | | | | _ \ / _____)
+// \ | | _____| | | | | | | | | | | \ \ \_______
+// \ | | | | |_____ | \_/ | | | | |_/ / _____ |
+// \ _____| |__| |________| \_______/ |__| |______/ (_______/
+//
+// This file is part of VirtualFluids. VirtualFluids is free software: you can
+// redistribute it and/or modify it under the terms of the GNU General Public
+// License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// VirtualFluids is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with VirtualFluids (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
+//
+//! \file Grid.cpp
+//! \ingroup Grid
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#include "Grid3D.h"
#include <set>
diff --git a/src/cpu/VirtualFluidsCore/Grid/Grid3D.h b/src/cpu/VirtualFluidsCore/Grid/Grid3D.h
index e271006438c4e5f3701a6810b1e9362d4cdbe95b..77e250439bfe2a3207b49b9e2e7ad59ad7e33ba7 100644
--- a/src/cpu/VirtualFluidsCore/Grid/Grid3D.h
+++ b/src/cpu/VirtualFluidsCore/Grid/Grid3D.h
@@ -1,3 +1,36 @@
+//=======================================================================================
+// ____ ____ __ ______ __________ __ __ __ __
+// \ \ | | | | | _ \ |___ ___| | | | | / \ | |
+// \ \ | | | | | |_) | | | | | | | / \ | |
+// \ \ | | | | | _ / | | | | | | / /\ \ | |
+// \ \ | | | | | | \ \ | | | \__/ | / ____ \ | |____
+// \ \ | | |__| |__| \__\ |__| \________/ /__/ \__\ |_______|
+// \ \ | | ________________________________________________________________
+// \ \ | | | ______________________________________________________________|
+// \ \| | | | __ __ __ __ ______ _______
+// \ | | |_____ | | | | | | | | | _ \ / _____)
+// \ | | _____| | | | | | | | | | | \ \ \_______
+// \ | | | | |_____ | \_/ | | | | |_/ / _____ |
+// \ _____| |__| |________| \_______/ |__| |______/ (_______/
+//
+// This file is part of VirtualFluids. VirtualFluids is free software: you can
+// redistribute it and/or modify it under the terms of the GNU General Public
+// License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// VirtualFluids is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with VirtualFluids (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
+//
+//! \file Grid.h
+//! \ingroup Grid
+//! \author Konstantin Kutscher, Soeren Freudiger, Sebastian Geller
+//=======================================================================================
+
#ifndef GRID3D_H
#define GRID3D_H
diff --git a/src/cpu/VirtualFluidsCore/Grid/Grid3DSystem.cpp b/src/cpu/VirtualFluidsCore/Grid/Grid3DSystem.cpp
index ea2ecde18744c95c5aa9a242ff2b76b83fb566b9..0eb9f995ee11492ac3eb4edacdb37c56564b255c 100644
--- a/src/cpu/VirtualFluidsCore/Grid/Grid3DSystem.cpp
+++ b/src/cpu/VirtualFluidsCore/Grid/Grid3DSystem.cpp
@@ -1,3 +1,36 @@
+//=======================================================================================
+// ____ ____ __ ______ __________ __ __ __ __
+// \ \ | | | | | _ \ |___ ___| | | | | / \ | |
+// \ \ | | | | | |_) | | | | | | | / \ | |
+// \ \ | | | | | _ / | | | | | | / /\ \ | |
+// \ \ | | | | | | \ \ | | | \__/ | / ____ \ | |____
+// \ \ | | |__| |__| \__\ |__| \________/ /__/ \__\ |_______|
+// \ \ | | ________________________________________________________________
+// \ \ | | | ______________________________________________________________|
+// \ \| | | | __ __ __ __ ______ _______
+// \ | | |_____ | | | | | | | | | _ \ / _____)
+// \ | | _____| | | | | | | | | | | \ \ \_______
+// \ | | | | |_____ | \_/ | | | | |_/ / _____ |
+// \ _____| |__| |________| \_______/ |__| |______/ (_______/
+//
+// This file is part of VirtualFluids. VirtualFluids is free software: you can
+// redistribute it and/or modify it under the terms of the GNU General Public
+// License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// VirtualFluids is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with VirtualFluids (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
+//
+//! \file Grid3DSystem.cpp
+//! \ingroup Grid
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#include <Grid3DSystem.h>
namespace Grid3DSystem
diff --git a/src/cpu/VirtualFluidsCore/Grid/Grid3DSystem.h b/src/cpu/VirtualFluidsCore/Grid/Grid3DSystem.h
index cb472bc50579fcfd27fe2354ab956c88a7762f2e..5eb883d0edeb8933599117f2f6bad017e6ddb56a 100644
--- a/src/cpu/VirtualFluidsCore/Grid/Grid3DSystem.h
+++ b/src/cpu/VirtualFluidsCore/Grid/Grid3DSystem.h
@@ -1,9 +1,36 @@
-// _ ___ __ __________ _ __
-// | | / (_)____/ /___ ______ _/ / ____/ /_ __(_)___/ /____
-// | | / / / ___/ __/ / / / __ `/ / /_ / / / / / / __ / ___/
-// | |/ / / / / /_/ /_/ / /_/ / / __/ / / /_/ / / /_/ (__ )
-// |___/_/_/ \__/\__,_/\__,_/_/_/ /_/\__,_/_/\__,_/____/
+//=======================================================================================
+// ____ ____ __ ______ __________ __ __ __ __
+// \ \ | | | | | _ \ |___ ___| | | | | / \ | |
+// \ \ | | | | | |_) | | | | | | | / \ | |
+// \ \ | | | | | _ / | | | | | | / /\ \ | |
+// \ \ | | | | | | \ \ | | | \__/ | / ____ \ | |____
+// \ \ | | |__| |__| \__\ |__| \________/ /__/ \__\ |_______|
+// \ \ | | ________________________________________________________________
+// \ \ | | | ______________________________________________________________|
+// \ \| | | | __ __ __ __ ______ _______
+// \ | | |_____ | | | | | | | | | _ \ / _____)
+// \ | | _____| | | | | | | | | | | \ \ \_______
+// \ | | | | |_____ | \_/ | | | | |_/ / _____ |
+// \ _____| |__| |________| \_______/ |__| |______/ (_______/
//
+// This file is part of VirtualFluids. VirtualFluids is free software: you can
+// redistribute it and/or modify it under the terms of the GNU General Public
+// License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// VirtualFluids is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with VirtualFluids (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
+//
+//! \file Grid3DSystem.h
+//! \ingroup Grid
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#ifndef Grid3DSystem_H
#define Grid3DSystem_H