Wow, that is exactly my Story, up to the jdbc driver!!

That was the first time they called.

I made a perfect confluence-wiki, for every server a page, for every application on that server a sub-page.

The Code-repo-links the config's the howto's everything was in there, the second time about 2 month after i went for the other job, they floded a Oracle-Db, called me and asked really rude what a shit installation i made, so i asked for the server pointed them to the Wiki-site and the first sentence boldly written said: DEV-VM -> DB-scheme-migration (DONT put DATAS IN, 20GB-DISK)