Hi,
Have you tried using this plugin in another Eclipse version?
It's a common practice, not desired, in java development to have multiple versions of eclipse. So to develop plugins for pam I keep a luna eclipse.
I've done lots of pam's connectors, is there something that you need from Oxygen (eclipse latest)? If there is, you develop an project as an testable api, that you can just port as a .jar to the connectors project. What I usually do when working with connectors,
I create a separate api project for the thing that I need to do:
For example:
Which syncs sdm users with ldap and have some junit to validate its usage. When I validate that this integration is working, I wrap it up as a jar to be imported at the pam's connector project
This is a workaround your problem, I know it's not ideal and it would be nice to have features like, default operators extensions.. but unfortunately this feats are not available. You can create an idea for this, and I'll surely upvote it.
Hope it helps