The sample program that comes with the Extension Library works just fine, but when I try to connect to Oracle I get the following error:
Error while reading the relation
The code may not automatically pick up jar files in that directory.
I don't know anything about xpages, but this site shows a manifest file for a notes/domino application, where they specify a class path for the application.
https://www.ibm.com/developerworks/lotus/library/notes-plugin-eclipse/#N100AC