diff --git a/GeoLib/IO/FEFLOW/FEFLOWGeoInterface.cpp b/GeoLib/IO/FEFLOW/FEFLOWGeoInterface.cpp
index de75b6a294e8b005c821386980db3dad81adda72..3275c0fc2c90f1fa2aa7cdcb585e67f3e30b62f8 100644
--- a/GeoLib/IO/FEFLOW/FEFLOWGeoInterface.cpp
+++ b/GeoLib/IO/FEFLOW/FEFLOWGeoInterface.cpp
@@ -24,18 +24,18 @@
 #include "GeoLib/Point.h"
 #include "GeoLib/Polygon.h"
 
-
 namespace GeoLib
 {
 namespace IO
 {
-
-void FEFLOWGeoInterface::readFEFLOWFile(const std::string &filename, GeoLib::GEOObjects& geoObjects)
+void FEFLOWGeoInterface::readFEFLOWFile(const std::string& filename,
+                                        GeoLib::GEOObjects& geoObjects)
 {
     std::ifstream in(filename.c_str());
     if (!in)
     {
-        ERR("FEFLOWGeoInterface::readFEFLOWFile(): Could not open file %s.", filename.c_str());
+        ERR("FEFLOWGeoInterface::readFEFLOWFile(): Could not open file %s.",
+            filename.c_str());
         return;
     }
 
@@ -51,14 +51,14 @@ void FEFLOWGeoInterface::readFEFLOWFile(const std::string &filename, GeoLib::GEO
     {
         getline(in, line_string);
         //....................................................................
-        // CLASS
-        if (line_string.find("CLASS") != std::string::npos) // the version number follows afterward, e.g. CLASS (v.5.313)
+        // CLASS: the version number follows afterward, e.g. CLASS (v.5.313)
+        if (line_string.find("CLASS") != std::string::npos)
         {
             getline(in, line_string);
             line_stream.str(line_string);
             // problem class, time mode, problem orientation, dimension, ...
             unsigned dummy = 0;
-            for (int i=0; i<3; i++)
+            for (int i = 0; i < 3; i++)
                 line_stream >> dummy;
             line_stream >> dimension;
             line_stream.clear();
@@ -69,7 +69,7 @@ void FEFLOWGeoInterface::readFEFLOWFile(const std::string &filename, GeoLib::GEO
         {
             getline(in, line_string);
             line_stream.str(line_string);
-            double vec[3] = { };
+            double vec[3] = {};
             line_stream >> vec[0] >> vec[1] >> vec[2];
             if (vec[0] == 0.0 && vec[1] == -1.0 && vec[2] == 0.0)
                 // x-z plane
@@ -104,13 +104,15 @@ void FEFLOWGeoInterface::readFEFLOWFile(const std::string &filename, GeoLib::GEO
             (*pt)[1] = .0;
         }
     }
-
 }
 
-
-void FEFLOWGeoInterface::readPoints(QDomElement &nodesEle, const std::string &tag, int dim, std::vector<GeoLib::Point*> &points)
+void FEFLOWGeoInterface::readPoints(QDomElement& nodesEle,
+                                    const std::string& tag,
+                                    int dim,
+                                    std::vector<GeoLib::Point*>& points)
 {
-    QDomElement xmlEle = nodesEle.firstChildElement(QString::fromStdString(tag));
+    QDomElement xmlEle =
+        nodesEle.firstChildElement(QString::fromStdString(tag));
     if (xmlEle.isNull())
         return;
     QString str_pt_list1 = xmlEle.text();
@@ -120,10 +122,11 @@ void FEFLOWGeoInterface::readPoints(QDomElement &nodesEle, const std::string &ta
     {
         std::getline(ss, line_str);
         BaseLib::trim(line_str, ' ');
-        if (line_str.empty()) continue;
+        if (line_str.empty())
+            continue;
         std::istringstream line_ss(line_str);
         std::size_t pt_id = 0;
-        std::array<double,3> pt_xyz;
+        std::array<double, 3> pt_xyz;
         line_ss >> pt_id;
         for (int i = 0; i < dim; i++)
             line_ss >> pt_xyz[i];
@@ -131,8 +134,10 @@ void FEFLOWGeoInterface::readPoints(QDomElement &nodesEle, const std::string &ta
     }
 }
 
-
-void FEFLOWGeoInterface::readSuperMesh(std::ifstream &in, unsigned dimension, std::vector<GeoLib::Point*>* &points, std::vector<GeoLib::Polyline*>* &lines)
+void FEFLOWGeoInterface::readSuperMesh(std::ifstream& in,
+                                       unsigned dimension,
+                                       std::vector<GeoLib::Point*>*& points,
+                                       std::vector<GeoLib::Polyline*>*& lines)
 {
     // get XML strings
     std::ostringstream oss;
@@ -156,7 +161,7 @@ void FEFLOWGeoInterface::readSuperMesh(std::ifstream &in, unsigned dimension, st
     }
 
     // get geometry data from XML
-    QDomElement docElem = doc.documentElement(); // #supermesh
+    QDomElement docElem = doc.documentElement();  // #supermesh
     // #nodes
     points = new std::vector<GeoLib::Point*>();
     QDomElement nodesEle = docElem.firstChildElement("nodes");
@@ -167,7 +172,7 @@ void FEFLOWGeoInterface::readSuperMesh(std::ifstream &in, unsigned dimension, st
         const QString str = nodesEle.attribute("count");
         const long n_points = str.toLong();
         points->resize(n_points);
-        //fixed
+        // fixed
         readPoints(nodesEle, "fixed", dimension, *points);
         readPoints(nodesEle, "linear", dimension, *points);
         readPoints(nodesEle, "parabolic", dimension, *points);
@@ -211,5 +216,5 @@ void FEFLOWGeoInterface::readSuperMesh(std::ifstream &in, unsigned dimension, st
     }
 }
 
-} // IO
-} // GeoLib
+}  // IO
+}  // GeoLib
diff --git a/GeoLib/IO/FEFLOW/FEFLOWGeoInterface.h b/GeoLib/IO/FEFLOW/FEFLOWGeoInterface.h
index 285145f88eb4f475a10434c62998df9a65da2dea..fb0603361c822bdd9b673483c46cc68ec9e2091c 100644
--- a/GeoLib/IO/FEFLOW/FEFLOWGeoInterface.h
+++ b/GeoLib/IO/FEFLOW/FEFLOWGeoInterface.h
@@ -17,16 +17,15 @@ class QDomElement;
 
 namespace GeoLib
 {
-    class GEOObjects;
-    class Point;
-    class Polyline;
+class GEOObjects;
+class Point;
+class Polyline;
 }
 
 namespace GeoLib
 {
 namespace IO
 {
-
 /**
  * Interface to geometric data in FEFLOW files
  */
@@ -39,22 +38,27 @@ public:
      * This function reads geometry data given in Supermesh.
      *
      * @param filename  FEFLOW file name
-     * @param geo_objects Geometric objects where imported geometry data are added
+     * @param geo_objects Geometric objects where imported geometry data are
+     * added
      */
-    void readFEFLOWFile(const std::string &filename, GeoLib::GEOObjects& geo_objects);
+    void readFEFLOWFile(const std::string& filename,
+                        GeoLib::GEOObjects& geo_objects);
 
     /// read points and polylines in Supermesh section
     ///
-    /// A super mesh is a collection of polygons, lines and points in the 2D plane
-    /// and will be used for mesh generation and to define the modeling region
-    static void readSuperMesh(std::ifstream &feflow_file, unsigned dimension, std::vector<GeoLib::Point*>* &points, std::vector<GeoLib::Polyline*>* &lines);
+    /// A super mesh is a collection of polygons, lines and points in the 2D
+    /// plane and will be used for mesh generation and to define the modeling
+    /// region
+    static void readSuperMesh(std::ifstream& feflow_file, unsigned dimension,
+                              std::vector<GeoLib::Point*>*& points,
+                              std::vector<GeoLib::Polyline*>*& lines);
 
 private:
     //// read point data in Supermesh
-    static void readPoints(QDomElement &nodesEle, const std::string &tag, int dim, std::vector<GeoLib::Point*> &points);
-
+    static void readPoints(QDomElement& nodesEle, const std::string& tag,
+                           int dim, std::vector<GeoLib::Point*>& points);
 };
-} // IO
-} // GeoLib
+}  // IO
+}  // GeoLib
 
 #endif /* FEFLOWGEOINTERFACE_H_ */
diff --git a/MeshLib/IO/FEFLOW/FEFLOWMeshInterface.cpp b/MeshLib/IO/FEFLOW/FEFLOWMeshInterface.cpp
index 0ee2cfb31190176ab54951adeb69f5d27b55e68d..4d38d038c95c0e49f4ddc526f4d165f45837ab2c 100644
--- a/MeshLib/IO/FEFLOW/FEFLOWMeshInterface.cpp
+++ b/MeshLib/IO/FEFLOW/FEFLOWMeshInterface.cpp
@@ -28,13 +28,13 @@ namespace MeshLib
 {
 namespace IO
 {
-
-MeshLib::Mesh* FEFLOWMeshInterface::readFEFLOWFile(const std::string &filename)
+MeshLib::Mesh* FEFLOWMeshInterface::readFEFLOWFile(const std::string& filename)
 {
     std::ifstream in(filename.c_str());
     if (!in)
     {
-        ERR("FEFLOWMeshInterface::readFEFLOWFile(): Could not open file %s.", filename.c_str());
+        ERR("FEFLOWMeshInterface::readFEFLOWFile(): Could not open file %s.",
+            filename.c_str());
         return nullptr;
     }
 
@@ -56,13 +56,17 @@ MeshLib::Mesh* FEFLOWMeshInterface::readFEFLOWFile(const std::string &filename)
     {
         getline(in, line_string);
         //....................................................................
-        // CLASS
-        if (line_string.find("CLASS") != std::string::npos) // the version number follows afterward, e.g. CLASS (v.5.313)
+        // CLASS: the version number follows afterward, e.g. CLASS (v.5.313)
+        if (line_string.find("CLASS") != std::string::npos)
         {
             getline(in, line_string);
             line_stream.str(line_string);
-            // problem class, time mode, problem orientation, dimension, nr. layers for 3D, saturation switch, precision of results, precision of coordinates
-            line_stream >> fem_class.problem_class >> fem_class.time_mode >> fem_class.orientation >> fem_class.dimension >> fem_class.n_layers3d;
+            // problem class, time mode, problem orientation, dimension, nr.
+            // layers for 3D, saturation switch, precision of results, precision
+            // of coordinates
+            line_stream >> fem_class.problem_class >> fem_class.time_mode >>
+                fem_class.orientation >> fem_class.dimension >>
+                fem_class.n_layers3d;
             line_stream.clear();
         }
         //....................................................................
@@ -72,13 +76,18 @@ MeshLib::Mesh* FEFLOWMeshInterface::readFEFLOWFile(const std::string &filename)
             // DIMENS
             getline(in, line_string);
             line_stream.str(line_string);
-            line_stream >> fem_dim.n_nodes >> fem_dim.n_elements >> fem_dim.n_nodes_of_element >> std::ws;
-            // create node pointers with dummy coordinates to create element objects.
+            line_stream >> fem_dim.n_nodes >> fem_dim.n_elements >>
+                fem_dim.n_nodes_of_element >> std::ws;
+            // create node pointers with dummy coordinates to create element
+            // objects.
             // True coordinates are set later in COOR and ELEV_I.
             vec_nodes.resize(fem_dim.n_nodes);
             std::size_t count = 0;
             double dummy_coords[3] = {};
-            std::generate(vec_nodes.begin(), vec_nodes.end(), [&]() { return new MeshLib::Node(dummy_coords, count++); });
+            std::generate(vec_nodes.begin(), vec_nodes.end(), [&]()
+                          {
+                              return new MeshLib::Node(dummy_coords, count++);
+                          });
             line_stream.clear();
         }
         //....................................................................
@@ -92,27 +101,39 @@ MeshLib::Mesh* FEFLOWMeshInterface::readFEFLOWFile(const std::string &filename)
                 eleType = MeshLib::MeshElemType::LINE;
             else if (fem_dim.n_nodes_of_element == 3)
                 eleType = MeshLib::MeshElemType::TRIANGLE;
-            else if (fem_dim.n_nodes_of_element == 4 && fem_class.dimension == 2)
+            else if (fem_dim.n_nodes_of_element == 4 &&
+                     fem_class.dimension == 2)
                 eleType = MeshLib::MeshElemType::QUAD;
-            else if (fem_dim.n_nodes_of_element == 4 && fem_class.dimension == 3)
+            else if (fem_dim.n_nodes_of_element == 4 &&
+                     fem_class.dimension == 3)
                 eleType = MeshLib::MeshElemType::TETRAHEDRON;
-            else if (fem_dim.n_nodes_of_element == 6 && fem_class.dimension == 3)
+            else if (fem_dim.n_nodes_of_element == 6 &&
+                     fem_class.dimension == 3)
                 eleType = MeshLib::MeshElemType::PRISM;
-            else if (fem_dim.n_nodes_of_element == 8 && fem_class.dimension == 3)
+            else if (fem_dim.n_nodes_of_element == 8 &&
+                     fem_class.dimension == 3)
                 eleType = MeshLib::MeshElemType::HEXAHEDRON;
 
-            if (eleType == MeshLib::MeshElemType::INVALID) {
-                ERR("FEFLOWInterface::readFEFLOWFile(): Unsupported element type with the number of node = %d and dim = %d", fem_dim.n_nodes_of_element, fem_class.dimension);
-                std::for_each(vec_nodes.begin(), vec_nodes.end(), [](MeshLib::Node* nod) { delete nod;});
+            if (eleType == MeshLib::MeshElemType::INVALID)
+            {
+                ERR("FEFLOWInterface::readFEFLOWFile(): Unsupported element "
+                    "type with the number of node = %d and dim = %d",
+                    fem_dim.n_nodes_of_element, fem_class.dimension);
+                std::for_each(vec_nodes.begin(), vec_nodes.end(),
+                              [](MeshLib::Node* nod)
+                              {
+                                  delete nod;
+                              });
                 vec_nodes.clear();
                 return nullptr;
             }
 
             vec_elements.reserve(fem_dim.n_elements);
-            for (std::size_t i=0; i<fem_dim.n_elements; i++)
+            for (std::size_t i = 0; i < fem_dim.n_elements; i++)
             {
                 getline(in, line_string);
-                vec_elements.push_back(readElement(fem_dim, eleType, line_string, vec_nodes));
+                vec_elements.push_back(
+                    readElement(fem_dim, eleType, line_string, vec_nodes));
             }
         }
         //....................................................................
@@ -135,7 +156,7 @@ MeshLib::Mesh* FEFLOWMeshInterface::readFEFLOWFile(const std::string &filename)
         {
             getline(in, line_string);
             line_stream.str(line_string);
-            double vec[3] = { };
+            double vec[3] = {};
             line_stream >> vec[0] >> vec[1] >> vec[2];
             if (vec[0] == 0.0 && vec[1] == -1.0 && vec[2] == 0.0)
                 // x-z plane
@@ -152,7 +173,8 @@ MeshLib::Mesh* FEFLOWMeshInterface::readFEFLOWFile(const std::string &filename)
         // SUPERMESH
         else if (line_string.compare("SUPERMESH") == 0)
         {
-            GeoLib::IO::FEFLOWGeoInterface::readSuperMesh(in, fem_class.dimension, points, lines);
+            GeoLib::IO::FEFLOWGeoInterface::readSuperMesh(
+                in, fem_class.dimension, points, lines);
         }
         //....................................................................
     }
@@ -165,13 +187,15 @@ MeshLib::Mesh* FEFLOWMeshInterface::readFEFLOWFile(const std::string &filename)
         new MeshLib::Mesh(project_name, vec_nodes, vec_elements)));
     INFO("Set values for material property.");
     auto opt_material_ids(mesh->getProperties().createNewPropertyVector<int>(
-            "MaterialIDs", MeshLib::MeshItemType::Cell, 1)
-    );
-    if (!opt_material_ids) {
+        "MaterialIDs", MeshLib::MeshItemType::Cell, 1));
+    if (!opt_material_ids)
+    {
         WARN("Could not create PropertyVector for MaterialIDs in Mesh.");
-    } else {
+    }
+    else
+    {
         setMaterialIDs(fem_class, fem_dim, lines, vec_elementsets, vec_elements,
-            *opt_material_ids);
+                       *opt_material_ids);
     }
 
     if (isXZplane)
@@ -194,17 +218,22 @@ MeshLib::Mesh* FEFLOWMeshInterface::readFEFLOWFile(const std::string &filename)
     return mesh.release();
 }
 
-
-void FEFLOWMeshInterface::readNodeCoordinates(std::ifstream &in, const FEM_CLASS &fem_class, const FEM_DIM &fem_dim, std::vector<MeshLib::Node*> &vec_nodes)
+void FEFLOWMeshInterface::readNodeCoordinates(
+    std::ifstream& in, const FEM_CLASS& fem_class, const FEM_DIM& fem_dim,
+    std::vector<MeshLib::Node*>& vec_nodes)
 {
-    const std::size_t no_nodes_per_layer = (fem_class.dimension == 2) ? fem_dim.n_nodes : fem_dim.n_nodes / (fem_class.n_layers3d + 1);
-    assert(no_nodes_per_layer>0);
-    const std::size_t n_lines = (no_nodes_per_layer-1) / 12 + 1;
-    const std::size_t n_layers = (fem_class.dimension == 3) ? fem_class.n_layers3d + 1 : 1;
+    const std::size_t no_nodes_per_layer =
+        (fem_class.dimension == 2)
+            ? fem_dim.n_nodes
+            : fem_dim.n_nodes / (fem_class.n_layers3d + 1);
+    assert(no_nodes_per_layer > 0);
+    const std::size_t n_lines = (no_nodes_per_layer - 1) / 12 + 1;
+    const std::size_t n_layers =
+        (fem_class.dimension == 3) ? fem_class.n_layers3d + 1 : 1;
     std::string line_string;
     std::stringstream line_stream;
     double x;
-    char dummy_char; // for comma(,)
+    char dummy_char;  // for comma(,)
     // x, y
     for (unsigned k = 0; k < 2; k++)
     {
@@ -233,27 +262,34 @@ void FEFLOWMeshInterface::readNodeCoordinates(std::ifstream &in, const FEM_CLASS
     }
 }
 
-std::vector<std::size_t> FEFLOWMeshInterface::getIndexList(const std::string &str_ranges)
+std::vector<std::size_t> FEFLOWMeshInterface::getIndexList(
+    const std::string& str_ranges)
 {
     std::vector<std::size_t> vec_node_IDs;
 
     // insert space before and after minus for splitting
-    std::string str_ranges2(BaseLib::replaceString("-",  " # ", str_ranges));
+    std::string str_ranges2(BaseLib::replaceString("-", " # ", str_ranges));
     BaseLib::trim(str_ranges2);
     auto splitted_str = BaseLib::splitString(str_ranges2, ' ');
     bool is_range = false;
     for (auto str : splitted_str)
     {
-        if (str.empty()) continue;
-        if (str[0]=='#') {
+        if (str.empty())
+            continue;
+        if (str[0] == '#')
+        {
             is_range = true;
-        } else if (is_range) {
+        }
+        else if (is_range)
+        {
             const std::size_t start = vec_node_IDs.back();
             const std::size_t end = BaseLib::str2number<std::size_t>(str);
-            for (std::size_t i=start+1; i<end+1; i++)
+            for (std::size_t i = start + 1; i < end + 1; i++)
                 vec_node_IDs.push_back(i);
             is_range = false;
-        } else {
+        }
+        else
+        {
             BaseLib::trim(str);
             vec_node_IDs.push_back(BaseLib::str2number<std::size_t>(str));
         }
@@ -262,15 +298,20 @@ std::vector<std::size_t> FEFLOWMeshInterface::getIndexList(const std::string &st
     return vec_node_IDs;
 }
 
-void FEFLOWMeshInterface::readElevation(std::ifstream &in, const FEM_CLASS &fem_class, const FEM_DIM &fem_dim, std::vector<MeshLib::Node*> &vec_nodes)
+void FEFLOWMeshInterface::readElevation(std::ifstream& in,
+                                        const FEM_CLASS& fem_class,
+                                        const FEM_DIM& fem_dim,
+                                        std::vector<MeshLib::Node*>& vec_nodes)
 {
-    const std::size_t no_nodes_per_layer = fem_dim.n_nodes / (fem_class.n_layers3d + 1);
+    const std::size_t no_nodes_per_layer =
+        fem_dim.n_nodes / (fem_class.n_layers3d + 1);
     double z = .0;
     std::string str_nodeList;
     std::string line_string;
     std::stringstream line_stream;
     std::size_t l = 0;
-    unsigned mode = 0; // 0: exit, 1: slice no, 2: elevation value, 3: continued line of mode 2
+    unsigned mode = 0;  // 0: exit, 1: slice no, 2: elevation value, 3:
+                        // continued line of mode 2
     int pos_prev_line = 0;
     while (true)
     {
@@ -283,15 +324,16 @@ void FEFLOWMeshInterface::readElevation(std::ifstream &in, const FEM_CLASS &fem_
             mode = 0;
         else if (line_string.empty())
             continue;
-        else if (line_string[0]=='\t')
+        else if (line_string[0] == '\t')
             mode = 3;
-        else if (columns.size()==1)
+        else if (columns.size() == 1)
             mode = 1;
-        else // columns.size()>1
+        else  // columns.size()>1
             mode = 2;
 
         // process stocked data
-        if (mode != 3 && !str_nodeList.empty()) {
+        if (mode != 3 && !str_nodeList.empty())
+        {
             // process previous lines
             auto vec_nodeIDs = getIndexList(str_nodeList);
             for (auto n0 : vec_nodeIDs)
@@ -302,20 +344,27 @@ void FEFLOWMeshInterface::readElevation(std::ifstream &in, const FEM_CLASS &fem_
             str_nodeList.clear();
         }
 
-        if (mode == 0) {
+        if (mode == 0)
+        {
             break;
-        } else if (mode == 1) {
+        }
+        else if (mode == 1)
+        {
             // slice number
             l++;
-            assert(l+1==BaseLib::str2number<std::size_t>(columns.front()));
-        } else if (mode == 2) {
+            assert(l + 1 == BaseLib::str2number<std::size_t>(columns.front()));
+        }
+        else if (mode == 2)
+        {
             // parse current line
             line_stream.str(line_string);
             line_stream >> z;
             getline(line_stream, str_nodeList);
             BaseLib::trim(str_nodeList, '\t');
             line_stream.clear();
-        } else if (mode == 3) {
+        }
+        else if (mode == 3)
+        {
             // continue reading node range
             BaseLib::trim(line_string, '\t');
             str_nodeList += " " + line_string;
@@ -327,9 +376,9 @@ void FEFLOWMeshInterface::readElevation(std::ifstream &in, const FEM_CLASS &fem_
         in.seekg(pos_prev_line);
 }
 
-MeshLib::Element* FEFLOWMeshInterface::readElement(const FEM_DIM &fem_dim,
-    const MeshLib::MeshElemType elem_type, const std::string& line,
-    const std::vector<MeshLib::Node*> &nodes)
+MeshLib::Element* FEFLOWMeshInterface::readElement(
+    const FEM_DIM& fem_dim, const MeshLib::MeshElemType elem_type,
+    const std::string& line, const std::vector<MeshLib::Node*>& nodes)
 {
     std::stringstream ss(line);
 
@@ -342,14 +391,15 @@ MeshLib::Element* FEFLOWMeshInterface::readElement(const FEM_DIM &fem_dim,
     {
         default:
             for (unsigned k(0); k < fem_dim.n_nodes_of_element; ++k)
-                ele_nodes[k] = nodes[idx[k]-1];
+                ele_nodes[k] = nodes[idx[k] - 1];
             break;
         case MeshLib::MeshElemType::HEXAHEDRON:
         case MeshLib::MeshElemType::PRISM:
-            const unsigned n_half_nodes = fem_dim.n_nodes_of_element/2;
-            for (unsigned k(0); k < n_half_nodes; ++k) {
-                ele_nodes[k] = nodes[idx[k+n_half_nodes]-1];
-                ele_nodes[k+n_half_nodes] = nodes[idx[k]-1];
+            const unsigned n_half_nodes = fem_dim.n_nodes_of_element / 2;
+            for (unsigned k(0); k < n_half_nodes; ++k)
+            {
+                ele_nodes[k] = nodes[idx[k + n_half_nodes] - 1];
+                ele_nodes[k + n_half_nodes] = nodes[idx[k] - 1];
             }
             break;
     }
@@ -374,13 +424,16 @@ MeshLib::Element* FEFLOWMeshInterface::readElement(const FEM_DIM &fem_dim,
     }
 }
 
-void FEFLOWMeshInterface::readELEMENTALSETS(std::ifstream &in, std::vector<std::vector<std::size_t>> &vec_elementsets)
+void FEFLOWMeshInterface::readELEMENTALSETS(
+    std::ifstream& in, std::vector<std::vector<std::size_t>>& vec_elementsets)
 {
-    auto compressSpaces = [](std::string const& str) {
+    auto compressSpaces = [](std::string const& str)
+    {
         std::stringstream ss(str);
         std::string new_str;
         std::string word;
-        while (ss) {
+        while (ss)
+        {
             ss >> word;
             new_str += " " + word;
         }
@@ -397,45 +450,55 @@ void FEFLOWMeshInterface::readELEMENTALSETS(std::ifstream &in, std::vector<std::
 
         unsigned mode = 0;
         if (!in)
-            mode = 0; // reached the end of the file
+            mode = 0;  // reached the end of the file
         else if (line_string.empty())
-            continue; // skip and see what comes next
+            continue;  // skip and see what comes next
         else if (std::isalpha(line_string[0]))
-            mode = 0; // reached the next section
+            mode = 0;  // reached the next section
         else if (line_string[0] == ' ')
-            mode = 1; // start of the element set definition
+            mode = 1;  // start of the element set definition
         else if (line_string[0] == '\t')
-            mode = 2; // continue the definition
+            mode = 2;  // continue the definition
         else
         {
-            ERR("Failed during parsing of an ELEMENTALSETS section in a FEFLOW file");
+            ERR("Failed during parsing of an ELEMENTALSETS section in a FEFLOW "
+                "file");
             break;
         }
 
-        if (mode!=2 && !str_idList.empty()) {
+        if (mode != 2 && !str_idList.empty())
+        {
             vec_elementsets.push_back(getIndexList(str_idList));
             str_idList.clear();
         }
 
-        if (mode == 0) {
+        if (mode == 0)
+        {
             break;
-        } else if (mode == 1) {
+        }
+        else if (mode == 1)
+        {
             // starting a new set
             std::string set_name;
             std::string ids;
             BaseLib::trim(line_string, ' ');
-            if (line_string[0]=='"') { // multiple words
+            if (line_string[0] == '"')
+            {  // multiple words
                 auto pos = line_string.find_last_of('"');
-                set_name = line_string.substr(1, pos-1); // without quotation
-                ids = line_string.substr(pos+1);
-            } else { // single word
+                set_name = line_string.substr(1, pos - 1);  // without quotation
+                ids = line_string.substr(pos + 1);
+            }
+            else
+            {  // single word
                 auto pos = line_string.find_first_of(' ');
                 set_name = line_string.substr(0, pos);
-                ids = line_string.substr(pos+1);
+                ids = line_string.substr(pos + 1);
             }
             INFO("Found an element group - %s", set_name.data());
             str_idList += compressSpaces(ids);
-        } else {
+        }
+        else
+        {
             // continue reading a element ids
             BaseLib::trim(line_string, '\t');
             str_idList += compressSpaces(line_string);
@@ -444,23 +507,28 @@ void FEFLOWMeshInterface::readELEMENTALSETS(std::ifstream &in, std::vector<std::
     // move stream position to previous line
     if (std::isalpha(line_string[0]))
         in.seekg(pos_prev_line);
-
 }
 
-void FEFLOWMeshInterface::setMaterialIDs(FEM_CLASS const& fem_class,
+void FEFLOWMeshInterface::setMaterialIDs(
+    FEM_CLASS const& fem_class,
     FEM_DIM const& fem_dim,
     std::vector<GeoLib::Polyline*>* const& lines,
     std::vector<std::vector<std::size_t>> const& vec_elementsets,
     std::vector<MeshLib::Element*> const& vec_elements,
-    std::vector<int> & material_ids)
+    std::vector<int>& material_ids)
 {
-    if (!vec_elementsets.empty()) {
-        for (std::size_t matid=0; matid<vec_elementsets.size(); ++matid) {
-            auto &eids = vec_elementsets[matid];
+    if (!vec_elementsets.empty())
+    {
+        for (std::size_t matid = 0; matid < vec_elementsets.size(); ++matid)
+        {
+            auto& eids = vec_elementsets[matid];
             for (auto eid : eids)
-                material_ids[eid-1] = matid; // Element IDs given by FEFLOW starts from one!
+                material_ids[eid - 1] =
+                    matid;  // Element IDs given by FEFLOW starts from one!
         }
-    } else if (lines && !lines->empty()) {
+    }
+    else if (lines && !lines->empty())
+    {
         for (std::size_t i = 0; i < vec_elements.size(); ++i)
         {
             MeshLib::Element const* e = vec_elements[i];
@@ -481,13 +549,16 @@ void FEFLOWMeshInterface::setMaterialIDs(FEM_CLASS const& fem_class,
             }
             material_ids[i] = matId;
         }
-    } else if (fem_class.n_layers3d>0) {
-        const std::size_t no_nodes_per_layer = fem_dim.n_nodes / (fem_class.n_layers3d + 1);
+    }
+    else if (fem_class.n_layers3d > 0)
+    {
+        const std::size_t no_nodes_per_layer =
+            fem_dim.n_nodes / (fem_class.n_layers3d + 1);
         for (std::size_t i = 0; i < vec_elements.size(); i++)
         {
             MeshLib::Element* e = vec_elements[i];
             unsigned e_min_nodeID = std::numeric_limits<unsigned>::max();
-            for (std::size_t j=0; j<e->getNBaseNodes(); j++)
+            for (std::size_t j = 0; j < e->getNBaseNodes(); j++)
                 e_min_nodeID = std::min(e_min_nodeID, e->getNodeIndex(j));
             std::size_t layer_id = e_min_nodeID / no_nodes_per_layer;
             material_ids[i] = layer_id;
@@ -495,5 +566,5 @@ void FEFLOWMeshInterface::setMaterialIDs(FEM_CLASS const& fem_class,
     }
 }
 
-} // IO
-} // MeshLib
+}  // IO
+}  // MeshLib
diff --git a/MeshLib/IO/FEFLOW/FEFLOWMeshInterface.h b/MeshLib/IO/FEFLOW/FEFLOWMeshInterface.h
index 6f1ae54cdf1dee03820c6a7a79b1a9a0c75c9e24..59654d57fcbd047ab08aa3854965914854af8b51 100644
--- a/MeshLib/IO/FEFLOW/FEFLOWMeshInterface.h
+++ b/MeshLib/IO/FEFLOW/FEFLOWMeshInterface.h
@@ -15,26 +15,25 @@
 
 namespace GeoLib
 {
-    class Point;
-    class Polyline;
+class Point;
+class Polyline;
 }
 
 namespace MeshLib
 {
-    class Mesh;
-    class Element;
-    class Node;
-    enum class MeshElemType;
+class Mesh;
+class Element;
+class Node;
+enum class MeshElemType;
 }
 
 namespace MeshLib
 {
 namespace IO
 {
-
 /**
- * Read FEFLOW model files (*.fem) into OGS data structure. Currently this class supports
- * only import of mesh data and some geometry given in Supermesh section.
+ * Read FEFLOW model files (*.fem) into OGS data structure. Currently this class
+ * supports only import of mesh data and some geometry given in Supermesh section.
  */
 class FEFLOWMeshInterface
 {
@@ -42,12 +41,13 @@ public:
     /**
      * read a FEFLOW Model file (*.fem) in ASCII format (Version 5.4)
      *
-     * This function reads mesh data in addition to geometry data given in Supermesh.
+     * This function reads mesh data in addition to geometry data given in
+     * Supermesh.
      *
      * @param filename  FEFLOW file name
      * @return a pointer to a created OGS mesh
      */
-    MeshLib::Mesh* readFEFLOWFile(const std::string &filename);
+    MeshLib::Mesh* readFEFLOWFile(const std::string& filename);
 
 private:
     // CLASS
@@ -85,28 +85,40 @@ private:
     };
 
     /// read node indices and create a mesh element
-    MeshLib::Element* readElement(const FEM_DIM &fem_dim, const MeshLib::MeshElemType elem_type, const std::string& line, const std::vector<MeshLib::Node*> &nodes);
+    MeshLib::Element* readElement(const FEM_DIM& fem_dim,
+                                  const MeshLib::MeshElemType elem_type,
+                                  const std::string& line,
+                                  const std::vector<MeshLib::Node*>& nodes);
 
     /// read node coordinates
-    void readNodeCoordinates(std::ifstream &in, const FEM_CLASS &fem_class, const FEM_DIM &fem_dim, std::vector<MeshLib::Node*> &nodes);
+    void readNodeCoordinates(std::ifstream& in,
+                             const FEM_CLASS& fem_class,
+                             const FEM_DIM& fem_dim,
+                             std::vector<MeshLib::Node*>& nodes);
 
     /// read elevation data
-    void readElevation(std::ifstream &in, const FEM_CLASS &fem_class, const FEM_DIM &fem_dim, std::vector<MeshLib::Node*> &vec_nodes);
+    void readElevation(std::ifstream& in,
+                       const FEM_CLASS& fem_class,
+                       const FEM_DIM& fem_dim,
+                       std::vector<MeshLib::Node*>& vec_nodes);
 
     //// parse node lists
-    std::vector<std::size_t> getIndexList(const std::string &str_ranges);
+    std::vector<std::size_t> getIndexList(const std::string& str_ranges);
 
     /// parse ELEMENTALSETS
-    void readELEMENTALSETS(std::ifstream &in, std::vector<std::vector<std::size_t>> &vec_elementsets);
+    void readELEMENTALSETS(
+        std::ifstream& in,
+        std::vector<std::vector<std::size_t>>& vec_elementsets);
 
-    void setMaterialIDs(FEM_CLASS const& fem_class,
+    void setMaterialIDs(
+        FEM_CLASS const& fem_class,
         FEM_DIM const& fem_dim,
         std::vector<GeoLib::Polyline*>* const& lines,
         std::vector<std::vector<std::size_t>> const& vec_elementsets,
         std::vector<MeshLib::Element*> const& vec_elements,
-        std::vector<int> & material_ids);
+        std::vector<int>& material_ids);
 };
-} // IO
-} // MeshLib
+}  // IO
+}  // MeshLib
 
 #endif /* FEFLOWMESHINTERFACE_H_ */