FIXED Deadlock situation.

Signed-off-by: Michael Grammling <m.grammling@external.telekom.de>
Merge pull request #26 from qivicon/event-deadlock

FIXED Deadlock situation.
https://bugs.eclipse.org/bugs/show_bug.cgi?id=435294
Merge pull request #25 from mariniss/master

Bug 423536 - Null check in rule fails
CQ #8340