Made methods in Storage project internal. Updated method names to be more descriptive. UpdateConversionCollector now actually throws a ArgumentNullException instead of a NullReferenceException. Related to Issue [WTI-290] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@3178 5a3db67b-de53-47b5-99c8-a1c30a6650e2