将（外部）关系（标记）添加到现有的Hibernate实体

I need to add a new many-to-many relationship to an existing Hibernate entity. I do not want to touch the original Hibernate entity bean or its configuration. What I am adding is a "tagging" feature that can be viewed as an external contribution and not part of the entity's data itself.I need to add a new many-to-many relationship t