Bug in EventQuery class detected as Blocker by Sonar itself

• Testcase included:

  yes
• Patch Submitted:

  Yes

Please see:

http://nemo.sonarsource.org/drilldown/violations/org.codehaus.sonar:sonar?priority=BLOCKER&rids[]=224229#

I looked at the Blocker item, found that this problem still existed on the trunk, and fixed the problem. I also created a unit test class, which did not exist.