hibernate referenceThe Hibernate Tools currently include plugins for the Eclipse IDE as well as Ant tasks for reverse engineering
of existing databases:
...
• Development Wizards: Several wizards are provided with the Hibernate Eclipse tools; you can use a wizard
to quickly generate Hibernate configuration (cfg.xml) files, or you may even completely reverse engineer
an existing database schema into POJO source files and Hibernate mapping files. The reverse engineering
wizard supports customizable templates.

Please refer to the Hibernate Tools package and it's documentation for more information.