#vulnerable code 
                                @Test
    public void testConfigurableBufferSize() throws IOException {
        final File file = File.createTempFile("log4j2", "test");
        file.deleteOnExit();
        final RandomAccessFile raf = new RandomAccessFile(file, "rw");
        final OutputStream os = NullOutputStream.NULL_OUTPUT_STREAM;
        final int bufferSize = 4 * 1024;
        assertNotEquals(bufferSize, RandomAccessFileManager.DEFAULT_BUFFER_SIZE);
        
        final RandomAccessFileManager manager = new RandomAccessFileManager(raf, file.getName(), os,
                false, bufferSize, null, null);
        
        // check the resulting buffer size is what was requested
        assertEquals(bufferSize, manager.getBufferSize());
    } 
                            #location 14 
                            #vulnerability type RESOURCE_LEAK
#fixed code
                                @Test
    public void testConfigurableBufferSize() throws IOException {
        final File file = File.createTempFile("log4j2", "test");
        file.deleteOnExit();
        try (final RandomAccessFile raf = new RandomAccessFile(file, "rw")) {
            final OutputStream os = NullOutputStream.NULL_OUTPUT_STREAM;
            final int bufferSize = 4 * 1024;
            assertNotEquals(bufferSize, RandomAccessFileManager.DEFAULT_BUFFER_SIZE);

            final RandomAccessFileManager manager = new RandomAccessFileManager(raf, file.getName(), os, false,
                    bufferSize, null, null);

            // check the resulting buffer size is what was requested
            assertEquals(bufferSize, manager.getBufferSize());
        }}