[material][doxygen] Fix doxygen errors

dumux/material/fluidsystems/base.hh

@@ -36,6 +36,10 @@ namespace Dumux
  *       liquid phase. This contribution is probably not big, but somebody
  *       has to find out its influence.
  */
+
+namespace FluidSystems
+{
+
 template <class Scalar, class Implementation>
 class BaseFluidSystem
 {
@@ -198,6 +202,7 @@ public:
     }
 };
 
+} // end namespace
 } // end namespace
 
 #endif

dumux/material/fluidsystems/brineair.hh

@@ -287,7 +287,7 @@ public:
      /*!
      * \brief Return the salt specific heat capacity \f$\mathrm{[J/molK]}\f$.
      *
-     * \param sPhaseIdx The index of the precipitated phase to consider
+     * \param phaseIdx The index of the precipitated phase to consider
      */
      static Scalar precipitateHeatCapacity(int phaseIdx)
     {

dumux/material/fluidsystems/nullparametercache.hh

@@ -19,7 +19,7 @@
 /*!
  * \file
  *
- * \brief @copybrief Dumux::FluidSystems::NullParameterCache
+ * \brief @copybrief Dumux::NullParameterCache
  */
 #ifndef DUMUX_NULL_PARAMETER_CACHE_HH
 #define DUMUX_NULL_PARAMETER_CACHE_HH

dumux/material/fluidsystems/parametercachebase.hh

@@ -19,7 +19,7 @@
 /*!
  * \file
  *
- * \brief @copybrief Dumux::FluidSystems::ParameterCacheBase
+ * \brief @copybrief Dumux::ParameterCacheBase
  */
 #ifndef DUMUX_PARAMETER_CACHE_BASE_HH
 #define DUMUX_PARAMETER_CACHE_BASE_HH

dumux/material/fluidsystems/spe5parametercache.hh

@@ -19,7 +19,7 @@
 /*!
  * \file
  *
- * \brief @copybrief Dumux::FluidSystems::Spe5ParameterCache
+ * \brief @copybrief Dumux::Spe5ParameterCache
  */
 #ifndef SPE5_PARAMETER_CACHE_HH
 #define SPE5_PARAMETER_CACHE_HH