Here is was I get when importing drools-eclipse as a maven project by setting the eclipse.ini as written in readme.txt in trunk
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
[Fatal Error] :1:1: Premature end of file.
Exception in thread "main" java.lang.OutOfMemoryError: PermGen space
By the way, it was the same before.