The birt component uses the Hibernate API that was exported within the org.hibernate.eclipse.libs plugin.
Since this plugin has been removed, there is no plugin exporting the Hibernate API.
Could you export the org.hibernate.* and javax.persistence package in any of the org.jboss.tools.hibernateX_X plugins
(org.jboss.tools.hibernate3_5, for instance)?
Attached is a possible patch.

manderse@redhat.com

in all honesty - we don't want to export this api if we can avoid it. That is what was causing all kinds of multiple version problems for us.

We would export only one plugin that would be used in the compile time.
Another solution is to add the required libraries to the birt component.

btw. I reckon this also fails in branch?

The branch includes the org.hibernate.eclipse.libs plugin so there is no problem.