Do you have a common base class for Hibernate entities?

Question

Do you have a common base class for Hibernate entities, i.e. a MappedSuperclass with id, version and other common properties? Are there any drawbacks?

Example:

Answer 1

This works fine for us. As well as the ID and creation date, we also have a modified date. We also have an intermediate TaggedBaseEntity that implements a Taggable interface, because some of our web application's entities have tags, like questions on Stack Overflow.