Mojo

The Maven exec plugin dropped/broke support for configuration an output file. It should be fixed: http://jira.codehaus.org/browse/MEXEC-86

JBoss

Hibernate 4 supports auto type registration. This is a pretty powerful feature and makes using JodaTime in your entities a whole lot easier. Unfortunately, hbm2ddl doesn’t support that yet which means that you can’t remove the @Type annotations from your code if you use hbm2dll to generate the schema: https://issues.jboss.org/browse/JBIDE-12444

Hibernate Tools 4 (which contains hbm2ddl) doesn’t come with a Maven plugin. You’d have to use Ant instead and the ant-run plugin. There is a Maven plugin from the Mojo project but it only supports Hibernate <=3.6.x: https://issues.jboss.org/browse/JBIDE-12445