Is it possible to create a BDM directly in Java?

Hi,

A long time ago, we could create create data objects pretty easy outside the Bonita Studio and import them into the Bonita Studio. With the new BDM feature this does not work anymore.

In my usecase I have an existing datamodel, created outside of the Bonita Studio, in Java. I would like to import that model classes in the Bonita Studio as a jar that creates Business Objects, on which I can add new Business Objects using the Studio. There is one big reason I want to do this:
DRY - Don't repeat yourself! I do not want to create the datamodel two times, and worse, manage all changes in two places.

I tried creating a class implementing the bdm Entity interface, but that does not seem to get recognized as a Business Object in the Studio:

import javax.persistence.Id;
import javax.persistence.Version;
import org.bonitasoft.engine.bdm.Entity;
@SuppressWarnings("serial")
public class Customer implements Entity {
private static final long serialVersionUID = 1L;
@Id
private Long persistenceId;
@Version
private Long persistenceVersion;
private String name;
@Override
public Long getPersistenceId() {
return persistenceId;
}
public void setPersistenceId(Long persistenceId) {
this.persistenceId = persistenceId;
}
@Override
public Long getPersistenceVersion() {
return persistenceVersion;
}
public void setPersistenceVersion(Long persistenceVersion) {
this.persistenceVersion = persistenceVersion;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}

Note: I am currently using Bonita BPM Community 7.3.0