#vulnerable code 
                                @Test
    public void testBackendFactoryDefaults() throws IOException {
        // Don't close a default NIO, it will close the background sync threads executor
        @SuppressWarnings("resource")
        RrdNioBackendFactory factory = new RrdNioBackendFactory();
        File rrdfile = testFolder.newFile("testfile");
        super.testBackendFactory(factory,rrdfile.getCanonicalPath());
    } 
                            #location 5 
                            #vulnerability type RESOURCE_LEAK
#fixed code
                                @Test
    public void testBackendFactoryDefaults() throws IOException {
        try (RrdNioBackendFactory factory = new RrdNioBackendFactory(0)) {
            File rrdfile = testFolder.newFile("testfile");
            super.testBackendFactory(factory,rrdfile.getCanonicalPath());
        }
    }