diff --git a/src/cpu/VirtualFluidsCore/Data/DataSet3D.h b/src/cpu/VirtualFluidsCore/Data/DataSet3D.h
index 4c9f96c0db7eaf239d5481853d25a4b2a9929355..5ed896ef471dcda6d3c6e51c9e49374d7fe4a5d5 100644
--- a/src/cpu/VirtualFluidsCore/Data/DataSet3D.h
+++ b/src/cpu/VirtualFluidsCore/Data/DataSet3D.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 DataSet3D.h
+//! \ingroup Data
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#ifndef DataSet3D_h
#define DataSet3D_h
@@ -11,6 +44,7 @@ typedef CbArray4D<LBMReal,IndexerX4X3X2X1> AverageValuesArray3D;
typedef CbArray4D<LBMReal,IndexerX4X3X2X1> ShearStressValuesArray3D;
typedef CbArray3D<LBMReal, IndexerX3X2X1> RelaxationFactorArray3D;
+//! A class provides an interface for data structures in the kernel.
class DataSet3D
{
public:
diff --git a/src/cpu/VirtualFluidsCore/Data/EsoTwist3D.h b/src/cpu/VirtualFluidsCore/Data/EsoTwist3D.h
index f24a56bf21229d10bf93e3fce9ce18c02ad27459..d076b88e5b6cf7575f203c74e9cc8cc36917d158 100644
--- a/src/cpu/VirtualFluidsCore/Data/EsoTwist3D.h
+++ b/src/cpu/VirtualFluidsCore/Data/EsoTwist3D.h
@@ -1,9 +1,48 @@
+//=======================================================================================
+// ____ ____ __ ______ __________ __ __ __ __
+// \ \ | | | | | _ \ |___ ___| | | | | / \ | |
+// \ \ | | | | | |_) | | | | | | | / \ | |
+// \ \ | | | | | _ / | | | | | | / /\ \ | |
+// \ \ | | | | | | \ \ | | | \__/ | / ____ \ | |____
+// \ \ | | |__| |__| \__\ |__| \________/ /__/ \__\ |_______|
+// \ \ | | ________________________________________________________________
+// \ \ | | | ______________________________________________________________|
+// \ \| | | | __ __ __ __ ______ _______
+// \ | | |_____ | | | | | | | | | _ \ / _____)
+// \ | | _____| | | | | | | | | | | \ \ \_______
+// \ | | | | |_____ | \_/ | | | | |_/ / _____ |
+// \ _____| |__| |________| \_______/ |__| |______/ (_______/
+//
+// 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 EsoTwist3D.h
+//! \ingroup Data
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#ifndef ESOTWIST3D_H
#define ESOTWIST3D_H
#include "DistributionArray3D.h"
#include <LBMSystem.h>
+//! \brief Abstract class for implementation of Esoteric Twist method
+//! \details EsoTwist3D provide an interface for different implementations of Esoteric Twist method
+//! <a href="https://doi.org/10.3390/computation5020019"><b>[ Geier et al., (2017), 10.3390/computation5020019]</b></a>
+// Geier, M., & Schönherr, M. (2017). Esoteric twist: an efficient in-place streaming algorithmus for the lattice Boltzmann method on massively parallel hardware. Computation, 5(2), 19.
+
+
class EsoTwistD3Q27UnrollArray{};
class EsoTwistPlusD3Q27UnrollArray{};
class EsoTwistPlusD3Q19UnrollArray{};
diff --git a/src/cpu/VirtualFluidsCore/Data/EsoTwistD3Q27System.cpp b/src/cpu/VirtualFluidsCore/Data/EsoTwistD3Q27System.cpp
index 0de7648cae41de1e926f9f8f1e9ff5454c65c077..752412f78e97884895962e9db5641dd93342970f 100644
--- a/src/cpu/VirtualFluidsCore/Data/EsoTwistD3Q27System.cpp
+++ b/src/cpu/VirtualFluidsCore/Data/EsoTwistD3Q27System.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 EsoTwistD3Q27System.cpp
+//! \ingroup Data
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#include "EsoTwistD3Q27System.h"
//index 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
diff --git a/src/cpu/VirtualFluidsCore/Data/EsoTwistD3Q27System.h b/src/cpu/VirtualFluidsCore/Data/EsoTwistD3Q27System.h
index b5924623daff2d9e485a086140a9e96ceb5d0714..bf5c1bf6989ec585f3db57c48b9db5fc7bf71ff6 100644
--- a/src/cpu/VirtualFluidsCore/Data/EsoTwistD3Q27System.h
+++ b/src/cpu/VirtualFluidsCore/Data/EsoTwistD3Q27System.h
@@ -1,8 +1,42 @@
+//=======================================================================================
+// ____ ____ __ ______ __________ __ __ __ __
+// \ \ | | | | | _ \ |___ ___| | | | | / \ | |
+// \ \ | | | | | |_) | | | | | | | / \ | |
+// \ \ | | | | | _ / | | | | | | / /\ \ | |
+// \ \ | | | | | | \ \ | | | \__/ | / ____ \ | |____
+// \ \ | | |__| |__| \__\ |__| \________/ /__/ \__\ |_______|
+// \ \ | | ________________________________________________________________
+// \ \ | | | ______________________________________________________________|
+// \ \| | | | __ __ __ __ ______ _______
+// \ | | |_____ | | | | | | | | | _ \ / _____)
+// \ | | _____| | | | | | | | | | | \ \ \_______
+// \ | | | | |_____ | \_/ | | | | |_/ / _____ |
+// \ _____| |__| |________| \_______/ |__| |______/ (_______/
+//
+// 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 EsoTwistD3Q27System.h
+//! \ingroup Data
+//! \author Konstantin Kutscher
+//=======================================================================================
+
#ifndef ESOTWISTD3Q27SYSTEM_H
#define ESOTWISTD3Q27SYSTEM_H
#include "D3Q27System.h"
+//!
struct EsoTwistD3Q27System
{
const static int FSTARTDIR = D3Q27System::FSTARTDIR;