To use the Hibernate Mapping Files and POJOs from a Database wizard, you need to first create a Hibernate reverse engineering file (hibernate.reveng.xml). The IDE provides a wizard for generating the file based on the data contained in the Hibernate configuration file and the tables you are using in your application.
The reverse engineering file is an XML file that can be used to modify the default settings used when generating Hibernate files from the metadata of the database specified in hibernate.cfg.xml. The file can be used to explicitly specify the database schema that is used, to filter out tables that should not be used and how JDBC types are mapped to Hibernate types.
To create hibernate.reveng.xml using the New File wizard:
When you click Finish, the file hibernate.reveng.xml is created in the location you specified and the file opens in the Source Editor.