Unable to create SVNRepository object

I think you are missing at least the library setup stuff:

    /*

     * Initializes the library to work with a repository via 

     * different protocols.

     */

    private static void setupLibrary() {

        /*

         * For using over http:// and https://

         */

        DAVRepositoryFactory.setup();

        /*

         * For using over svn:// and svn+xxx://

         */

        SVNRepositoryFactoryImpl.setup();

        /*

         * For using over file:///

         */

        FSRepositoryFactory.setup();

    }