don't make reason for exception a mystery

Change-Id: I3a3a2273dc0f97931dd6ddfd9492d5a883448aa3
mediawiki options went missing

regression from 34bcf9b498bccb5c924f4cec850ff15d88df6f07

Change-Id: Ibd0645bd218c81da110b3704a530e3849b761fb4
Date:   Wed Aug 13 10:08:31 2014 +0200
    java: remove dead methods
    found by UCDetector