#vulnerable code 
                                @Test
    public void testWriteToNullCoverage() throws Exception {
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        Base64OutputStream out = new Base64OutputStream(bout);
        try {
            out.write(null, 0, 0);
            fail("Expcted Base64OutputStream.write(null) to throw a NullPointerException");
        } catch (NullPointerException e) {
            // Expected
        }
    } 
                            #location 6 
                            #vulnerability type RESOURCE_LEAK
#fixed code
                                @Test
    public void testWriteToNullCoverage() throws Exception {
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        Base64OutputStream out = new Base64OutputStream(bout);
        try {
            out.write(null, 0, 0);
            fail("Expcted Base64OutputStream.write(null) to throw a NullPointerException");
        } catch (NullPointerException e) {
            // Expected
        } finally {
            out.close();
        }
    }