+ The class \a CommInterface is the gateway to the MPI library.
+ It is a wrapper around all MPI calls, thus trying to abstract the rest of the code from using the direct MPI API
+ (but this is not strictly respected overall in practice ...). It is used in all
+ the \ref parallel "DEC related classes".
+
+ It is typically instanciated after the MPI_Init() call in a program and is afterwards passed as a
+ parameter to the constructors of various \ref parallel "parallel objects" so that they access the
+ MPI library via this common interface.