- Implemented new abstract class in existing classes. - Removed duplicate code. Related to Issue [WTI-710]git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@5260 5a3db67b-de53-47b5-99c8-a1c30a6650e2Former-commit-id: 4f5c18efa64fbf45b0492f77e38d20827d7ca1ceFormer-commit-id: 24694eae59be399739528675cf3090a4dd077d92