[Engine-devel] Best place for new interfaces used by bll

Hi, I am working on refactoring some of the backend code in bll and need to create interfaces so that I can eliminate the dependency between bll and the new module. Currently I created the interfaces in org.ovirt.engine.core.common.interfaces, but from what I understand this module is used by both frontend and backend. The new interfaces will only be used by the backend. What would be the best place to put these new interfaces? Ravi