output: #fixed code
                                  @Test
      public void testBackendFactory() throws IOException {
          File rrdfile = testFolder.newFile("testfile");
          try(RrdSafeFileBackendFactory factory = new RrdSafeFileBackendFactory()) {
              super.testBackendFactory(factory,rrdfile.getCanonicalPath());
          }
      }
input: #vulnerable code 
                                  @Test
      public void testBackendFactory() throws IOException {
          RrdRandomAccessFileBackendFactory factory = (RrdRandomAccessFileBackendFactory) RrdBackendFactory.getFactory("SAFE");
  
          File rrdfile = testFolder.newFile("testfile");
          RrdBackend be = factory.open(rrdfile.getCanonicalPath(), false);
  
          be.setLength(10);
          be.writeDouble(0, 0);
          be.close();
          DataInputStream is = new DataInputStream(new FileInputStream(rrdfile));
          Double d = is.readDouble();
          Assert.assertEquals("write to random access file failed", 0, d, 1e-10);
          is.close();
      } 
                              #location 15 
                              #vulnerability type RESOURCE_LEAK