[zeroeqmodel]: Missing parameter description for doxygen added

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@15503 2fb0f335-1f38-0410-981e-8018bf24f1b0

dumux/freeflow/zeroeq/zeroeqmodel.hh

@@ -280,6 +280,7 @@ public:
      * \brief Writes the data into the volVarsData.csv file
      *
      * \param stream The output file stream
+     * \param volVars The volume variables
      */
     void writeVolVarsData(std::ofstream &stream, const VolumeVariables &volVars)
     {
@@ -314,6 +315,7 @@ public:
      * \brief Writes the data into the fluxVarsData.csv file
      *
      * \param stream The output file stream
+     * \param fluxVars The flux variables
      */
     void writeFluxVarsData(std::ofstream &stream, const FluxVariables &fluxVars)
     {