[451350] - EMF generated JavaDoc is invalid

Change-Id: I6042f679de9ee66eb1b4f345968e91334b4c8975
Signed-off-by: Tom Schindl <tom.schindl@bestsolution.at>
[451208] Handle broken proxy better for getExtendedClass.
[448726] Improve Javadoc for isAncestor.
[444976] Guard against recursive setSelection calls.
[445597] Fix unused import warning for nested class names.