diff --git a/include/engine/hdf5/HDF5WriterP.h b/include/engine/hdf5/HDF5WriterP.h
index 098a56c45920d4b1e4e102d461163c45fd7a2dbd..9dc00a3296235344db23279bf3893d7ca0c49628 100644
--- a/include/engine/hdf5/HDF5WriterP.h
+++ b/include/engine/hdf5/HDF5WriterP.h
@@ -16,7 +16,6 @@
 
 #include "core/Engine.h"
 
-
 // supported capsules
 #include "capsule/heap/STLVector.h"
 
@@ -24,200 +23,92 @@
 
 #include <hdf5.h>
 
-namespace adios {
-  /*
-typedef struct {
-  double _re; //real part
-  double _im; //imaginary part
-} ADIOS2_Complex_Double;
-
-typedef struct {
-  float _re; // real
-  float _im; // imaginary part
-} ADIOS2_Complex_Float;
+namespace adios
+{
 
-// using ADIOS2_Complex_Float = std::complex<float>;
-
-typedef struct {
-  long double _re; //real part
-  long double _im; //imaginary part
-} ADIOS2_Complex_LongDouble;
-*/
-class HDF5Writer : public Engine {
+class HDF5Writer : public Engine
+{
 
 public:
-  /**
-   * Constructor for single BP capsule engine, writes in BP format into a single
-   * heap capsule
-   * @param name unique name given to the engine
-   * @param accessMode
-   * @param mpiComm
-   * @param method
-   * @param debugMode
-   */
-  HDF5Writer(ADIOS &adios, const std::string name, const std::string accessMode,
-             MPI_Comm mpiComm, const Method &method);
-
-  virtual ~HDF5Writer();
-
-  void Write(Variable<char> &variable, const char *values);
-  void Write(Variable<unsigned char> &variable, const unsigned char *values);
-  void Write(Variable<short> &variable, const short *values);
-  void Write(Variable<unsigned short> &variable, const unsigned short *values);
-  void Write(Variable<int> &variable, const int *values);
-  void Write(Variable<unsigned int> &variable, const unsigned int *values);
-  void Write(Variable<long int> &variable, const long int *values);
-  void Write(Variable<unsigned long int> &variable,
-             const unsigned long int *values);
-  void Write(Variable<long long int> &variable, const long long int *values);
-  void Write(Variable<unsigned long long int> &variable,
-             const unsigned long long int *values);
-  void Write(Variable<float> &variable, const float *values);
-  void Write(Variable<double> &variable, const double *values);
-  void Write(Variable<long double> &variable, const long double *values);
-  void Write(Variable<std::complex<float>> &variable,
-             const std::complex<float> *values);
-  void Write(Variable<std::complex<double>> &variable,
-             const std::complex<double> *values);
-  void Write(Variable<std::complex<long double>> &variable,
-             const std::complex<long double> *values);
-
-  void Write(const std::string variableName, const char *values);
-  void Write(const std::string variableName, const unsigned char *values);
-  void Write(const std::string variableName, const short *values);
-  void Write(const std::string variableName, const unsigned short *values);
-  void Write(const std::string variableName, const int *values);
-  void Write(const std::string variableName, const unsigned int *values);
-  void Write(const std::string variableName, const long int *values);
-  void Write(const std::string variableName, const unsigned long int *values);
-  void Write(const std::string variableName, const long long int *values);
-  void Write(const std::string variableName,
-             const unsigned long long int *values);
-  void Write(const std::string variableName, const float *values);
-  void Write(const std::string variableName, const double *values);
-  void Write(const std::string variableName, const long double *values);
-  void Write(const std::string variableName, const std::complex<float> *values);
-  void Write(const std::string variableName,
-             const std::complex<double> *values);
-  void Write(const std::string variableName,
-             const std::complex<long double> *values);
-
-  void Close(const int transportIndex = -1);
-  /*
-  {
-      std::cout<<" ===> CLOSING HDF5 <===== "<<std::endl;
-      //H5Dclose(_dset_id);
-      //H5Sclose(_filespace);
-      //H5Sclose(_memspace);
-      //H5Pclose(_plist_id);
-      H5Fclose(_file_id);
-  }
-  */
+    /**
+     * Constructor for single BP capsule engine, writes in BP format into a
+     * single
+     * heap capsule
+     * @param name unique name given to the engine
+     * @param accessMode
+     * @param mpiComm
+     * @param method
+     * @param debugMode
+     */
+    HDF5Writer(ADIOS &adios, const std::string name,
+               const std::string accessMode, MPI_Comm mpiComm,
+               const Method &method);
+
+    virtual ~HDF5Writer();
+
+    void Write(Variable<char> &variable, const char *values);
+    void Write(Variable<unsigned char> &variable, const unsigned char *values);
+    void Write(Variable<short> &variable, const short *values);
+    void Write(Variable<unsigned short> &variable,
+               const unsigned short *values);
+    void Write(Variable<int> &variable, const int *values);
+    void Write(Variable<unsigned int> &variable, const unsigned int *values);
+    void Write(Variable<long int> &variable, const long int *values);
+    void Write(Variable<unsigned long int> &variable,
+               const unsigned long int *values);
+    void Write(Variable<long long int> &variable, const long long int *values);
+    void Write(Variable<unsigned long long int> &variable,
+               const unsigned long long int *values);
+    void Write(Variable<float> &variable, const float *values);
+    void Write(Variable<double> &variable, const double *values);
+    void Write(Variable<long double> &variable, const long double *values);
+    void Write(Variable<std::complex<float>> &variable,
+               const std::complex<float> *values);
+    void Write(Variable<std::complex<double>> &variable,
+               const std::complex<double> *values);
+    void Write(Variable<std::complex<long double>> &variable,
+               const std::complex<long double> *values);
+
+    void Write(const std::string variableName, const char *values);
+    void Write(const std::string variableName, const unsigned char *values);
+    void Write(const std::string variableName, const short *values);
+    void Write(const std::string variableName, const unsigned short *values);
+    void Write(const std::string variableName, const int *values);
+    void Write(const std::string variableName, const unsigned int *values);
+    void Write(const std::string variableName, const long int *values);
+    void Write(const std::string variableName, const unsigned long int *values);
+    void Write(const std::string variableName, const long long int *values);
+    void Write(const std::string variableName,
+               const unsigned long long int *values);
+    void Write(const std::string variableName, const float *values);
+    void Write(const std::string variableName, const double *values);
+    void Write(const std::string variableName, const long double *values);
+    void Write(const std::string variableName,
+               const std::complex<float> *values);
+    void Write(const std::string variableName,
+               const std::complex<double> *values);
+    void Write(const std::string variableName,
+               const std::complex<long double> *values);
+
+    void Close(const int transportIndex = -1);
+
 private:
-  capsule::STLVector
-      m_Buffer; ///< heap capsule, contains data and metadata buffers
+    capsule::STLVector
+        m_Buffer; ///< heap capsule, contains data and metadata buffers
+
+    void Init();
+    void clean();
+
+    hid_t _plist_id, _file_id, _dset_id;
+    hid_t _memspace, _filespace;
+
+    hid_t DefH5T_COMPLEX_DOUBLE;
+    hid_t DefH5T_COMPLEX_FLOAT;
+    hid_t DefH5T_COMPLEX_LongDOUBLE;
 
-  void Init();
-  void clean();
-
-  hid_t _plist_id, _file_id, _dset_id;
-  hid_t _memspace, _filespace;
-
-  hid_t DefH5T_COMPLEX_DOUBLE;
-  hid_t DefH5T_COMPLEX_FLOAT;
-  hid_t DefH5T_COMPLEX_LongDOUBLE;
-
-  //hid_t DefH5T_filetype_COMPLEX_DOUBLE;
-  //hid_t DefH5T_filetype_COMPLEX_FLOAT;
-  //hid_t DefH5T_filetype_COMPLEX_LongDOUBLE;
-
-  template <class T>
-  void UseHDFWrite(Variable<T> &variable, const T *values, hid_t h5type);
-
-  /*
-  template<class T>
-    void UseHDFWrite( Variable<T>& variable, const T* values, hid_t h5type )
-  {
-      //here comes your magic at Writing now variable.m_UserValues has the data
-  passed by the user
-      //set variable
-      variable.m_AppValues = values;
-      m_WrittenVariables.insert( variable.m_Name );
-
-      std::cout<<"writting : "<<variable.m_Name<<" dim
-  size:"<<variable.m_GlobalDimensions.size()<<std::endl;
-
-      int dimSize = variable.m_GlobalDimensions.size();
-      //hsize_t     dimsf[dimSize], count[dimSize], offset[dimSize];
-      std::vector<hsize_t>  dimsf, count, offset;
-
-      for(int i=0; i<dimSize; i++) {
-        dimsf.push_back(variable.m_GlobalDimensions[i]);
-        count.push_back(dimsf[i]);
-        offset.push_back(0);
-      }
-      count[0] = dimsf[0]/m_SizeMPI;
-      offset[0]= m_RankMPI*count[0];
-
-      _filespace = H5Screate_simple(dimSize, dimsf.data(), NULL);
-
-      _dset_id = H5Dcreate(_file_id, variable.m_Name.c_str(), h5type,
-  _filespace, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
-      H5Sclose(_filespace);
-
-      _memspace = H5Screate_simple(dimSize, count.data(), NULL);
-
-      //Select hyperslab
-
-      _filespace = H5Dget_space(_dset_id);
-      H5Sselect_hyperslab(_filespace, H5S_SELECT_SET, offset.data(), NULL,
-  count.data(), NULL);
-
-
-      //  Create property list for collective dataset write.
-
-      _plist_id = H5Pcreate(H5P_DATASET_XFER);
-      H5Pset_dxpl_mpio(_plist_id, H5FD_MPIO_COLLECTIVE);
-
-      herr_t status;
-      if (m_SizeMPI == 1) {
-        status = H5Dwrite(_dset_id, h5type, _memspace, _filespace, _plist_id,
-  values);
-      } else {
-        std::vector<T> val;
-        for (int i=0; i<100; i++) {
-          //hsize_t c = count[i];
-          //hsize_t o = offset[i];
-          val.push_back(0);
-        }
-        status = H5Dwrite(_dset_id, h5type, _memspace, _filespace, _plist_id,
-  val.data());
-      }
-
-      if (status < 0) {
-        // error
-        std::cerr<<" Write failed. "<<std::endl;
-      }
-
-      std::cout <<" ==> User is responsible for freeing the data "<<std::endl;
-      //free(values);
-
-
-      //Close/release resources.
-
-      //H5Dclose(_dset_id);
-      //H5Sclose(_filespace);
-      //H5Sclose(_memspace);
-      //H5Pclose(_plist_id);
-      //H5Fclose(_file_id);
-
-      H5Dclose(_dset_id);
-      H5Sclose(_filespace);
-      H5Sclose(_memspace);
-      H5Pclose(_plist_id);
+    template <class T>
+    void UseHDFWrite(Variable<T> &variable, const T *values, hid_t h5type);
 
-  }
-  */
 };
 
 } // end namespace adios