--- trunk/OOPSE/libmdtools/AbstractClasses.hpp	2003/09/12 20:51:29	762
+++ trunk/OOPSE/libmdtools/AbstractClasses.hpp	2003/09/15 16:52:02	763
@@ -52,6 +52,7 @@ class BaseIntegrator{ (public)
   virtual ~BaseIntegrator(){}
   
   virtual void integrate( void ) = 0;
+  virtual double  getConservedQuantity(void) = 0;  
 };
 /*
 template<typename T> class AbstractTemplateIntegrator : public T