added OutOfMemoryError as subclass of SystemError because I expect

this to be the most popular error reason :)

[[Imported from SVN: r984]]

common/exceptions.hh

@@ -10,9 +10,9 @@
 
 namespace Dune {
 
-  /*! \file exceptions.hh */
 
   /*! \defgroup Exceptions Exception handling
+     \ingroup Common
 
      The Dune-exceptions are designed to allow a simple derivation of subclasses
      and to accept a text written in the '<<' syntax.
@@ -60,6 +60,14 @@ namespace Dune {
 
    */
 
+  /*! \file
+
+     This file defines a common framework for generating exception
+     subclasses and to throw them in a simple manner
+
+   */
+
+
   /*! \brief Base class for Dune-Exceptions
 
      all Dune exceptions are derived from this class via trivial subclassing:
@@ -167,6 +175,11 @@ namespace Dune {
    */
   class SystemError : public Exception {};
 
+  /*! default exception if memory allocation fails
+
+   */
+  class OutOfMemoryError : public SystemError {};
+
 } // end namespace
 
 #endif