VQWiki has native support for oracle built in. The drawback is of course you have to add the jdbc thin driver yourself in the installation. I would also prefer to wait for the Version 2.7.8 which will be released in a short time.
Version 2.7.8 was released on time. Though VQWiki has native support for Oracle, it uses file-based storage by default. That said, it's a matter of dropping in your thin driver and configuring some basic info to get up and running with Oracle support.
BTW: you can start off using file-based persistency and then use the import function to move from file-based to DB-based.