some updates to iodb plugin


git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@29371 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
forgot two files, sorry


git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@29372 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
[josm_openstreetbugs] fix #josm8515 - NPE

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@29373 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4