ref #8162 move OriginalSourceXXX to reference package
ref #6330 Adapt comparator to specific sorting
ref #4232 refactoring for comparator
ref #4232: adapt comparator to comaparator contract
ref #6190 removing svn property place holder in first line of code - java files
Enhance source comparator #3185
Implement generic comparator for OriginalSourceBase #3185