I just wanted to mention that the was a bug in the code-drop for the java stuff. The files in workbench/src/java/src/com/abtcore/api/com/com/aptcore/com should have been simply in workbench/src/java/src/com/abtcore/api/com.
This and Java-5 compatibilité (the keywork "enum" was introduced after Java-3) have been fixed in forked code in the OWBooster project on the source-code Subversion repository.
The code is still not Java-6 'compilable'. There seems to be a weird locale thing that goes on in sun...text or something.