[From OTN]
Oracle SQL Developer 1.5 expands its file-based support by introducing tight integration with the CVS and Subversion version control systems. In addition to letting you browse and edit files in the file system, this Oracle SQL Developer release enables you to import files into your source control system, check them out, modify them, and commit the changed files back into the source control system.
The article continues at
http://www.oracle.com/technology/oramag/oracle/08-jul/o48sql.html