If you have the OpenEdge Documentation and Samples installed, you can find a sample interface implementation class, HybridRealm.cls, at $DLC\src\samples\security. The sample contains README.txt that describes the process of creating an OpenEdge database with user account that will work with the sample OOABL server class.
You can access the sample files from the openedge_doc directory, contained in the .zip or .tar files available on the Progress ESD (Electronic Software Download) site or from
http://communities.progress.com/pcom/docs/DOC-16074 .