@AfterClass
    public static void afterClass() throws Exception {
        File file = new File(VALID_FILE);
        if (!file.delete()) {
            throw new Exception("Finished testing for routing table persistency" +
                    "and trying to cleanup resources used, " +
                    "but for some reason the file " + VALID_FILE + " could not be deleted.");
        }
        file = new File(INVALID_ADDRESS_FILE);
        if (!file.delete()) {
            throw new Exception("Finished testing for routing table persistency" +
                    "and trying to cleanup resources used, " +
                    "but for some reason the file " + INVALID_ADDRESS_FILE + " could not be deleted.");
        }
        file = new File(INVALID_PORT_FILE);
        if (!file.delete()) {
            throw new Exception("Finished testing for routing table persistency" +
                    "and trying to cleanup resources used, " +
                    "but for some reason the file " + INVALID_PORT_FILE + " could not be deleted.");
        }
        file = new File(INVALID_UUID_FILE);
        if (!file.delete()) {
            throw new Exception("Finished testing for routing table persistency" +
                    "and trying to cleanup resources used, " +
                    "but for some reason the file " + INVALID_UUID_FILE + " could not be deleted.");
        }
    }