* Use List.isEmpty
* Use multi-catch
* Use varargs reflection methods
* Save action removed trailing whitespaces

Change-Id: I9830c79f2452ad07cdb86702b220cc0d9eb0843a
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform/+/184406
Tested-by: Platform Bot <platform-bot@eclipse.org>
Reviewed-by: Alexander Kurtakov <akurtako@redhat.com>