Novell Identity Manager and Renamed Jar Files

As part of an install of the IDM engine patch on a server, the original files were renamed without a .jar extension but the files are left in the same lib folder. Is this safe, or would the class loader try to load them as well even though they have a different extension?

Any .jar or .zip files would have a problem with just renaming the file. They should be removed from the directory, not just renamed. For any other files, as long as they aren't .zip or .jar it should be OK.