The only dependency of the tool on hibernate is the forum link. Unfortunately the forum API wasn't designed to be called from outside the forum tool. There are problems I can't fix without either changing forum or doing some of my own hibernate operation. The issue is quite well documented in ForumEntity.java. Perhaps a hibernate guru can come up with a different solution.
Update hibernate dependencies to the new hibernate-core jar:
lessonbuilder/components/pom.xml: <artifactId>hibernate</artifactId>
lessonbuilder/tool/pom.xml: <artifactId>hibernate</artifactId>
The second should also be investigated as it almost certainly is either an unused dependency or a leak of an impl concern to the tool