Ask YC: wiki for java docs?

I am trying to put together a wiki for a project at work which is written in Java. I would like to promote collaboration between the programmers, in addition to the top-down funnel knowledge-base currently put in place by the project manager. The goal is to provide wiki-like edit capabilities to an existing set of generated java docs, and also to integrate into the wiki the growing knowledge base collection of developer questions / solutions currently being gathered by the project manager.

I've looked at sites such as wikia.com and wetpaint.com for hosted wiki solutions, but didn't find any solutions to import the existing knowledge base (Word documents :)) and the generated java docs. Unless there are some functions on these services I am not aware of?

I also looked at jdocs.com, which appears to do just that - provide editing for java docs, but I found its UI not appealing.

What I have in mind is something that looks like Facebook's developers wiki - http://wiki.developers.facebook.com/index.php/Main_Page

Or is there is a mediawiki plug-in that does just this?