The Metamodelgen project (https://github.com/hibernate/hibernate-metamodelgen) should be merged into the ORM codebase. As part of this also the METAGEN jira projects needs to be merged into HHH.
Move hibernate-maven-plugin and hibernate-gradle-plugin under tooling sub directory
Switch to a Gradle based build
To keep the history of the metamodelen code the git subtree command can be used - http://stackoverflow.com/questions/1425892/how-do-you-merge-two-git-repositories
Bulk closing tickets resolved in released versions