#vulnerable code 
                                public boolean generate(Class<?> ... classes) throws FileNotFoundException {
        // first pass using a null writer to fill up the LinkedListRegister objects
        out = new PrintWriter(new Writer() {
            @Override public void close() { }
            @Override public void flush() { }
            @Override public void write(char[] cbuf, int off, int len) { }
        });
        functionDefinitions = new LinkedListRegister<String>();
        functionPointers    = new LinkedListRegister<String>();
        deallocators        = new LinkedListRegister<Class>();
        arrayDeallocators   = new LinkedListRegister<Class>();
        jclasses            = new LinkedListRegister<Class>();
        jclassesInit        = new LinkedListRegister<Class>();
        members             = new HashMap<Class,LinkedList<String>>();
        mayThrowExceptions  = false;
        if (doClasses(true, classes)) {
            // second pass with the real writer
            out = writer != null ? writer : new PrintWriter(file);
            doClasses(mayThrowExceptions, classes);
            return true;
        }
        return false;
    } 
                            #location 18 
                            #vulnerability type RESOURCE_LEAK
#fixed code
                                public boolean generate(Class<?> ... classes) throws FileNotFoundException {
        // first pass using a null writer to fill up the LinkedListRegister objects
        out = new PrintWriter(new Writer() {
            @Override public void close() { }
            @Override public void flush() { }
            @Override public void write(char[] cbuf, int off, int len) { }
        });
        functionDefinitions = new LinkedListRegister<String>();
        functionPointers    = new LinkedListRegister<String>();
        deallocators        = new LinkedListRegister<Class>();
        arrayDeallocators   = new LinkedListRegister<Class>();
        jclasses            = new LinkedListRegister<Class>();
        jclassesInit        = new LinkedListRegister<Class>();
        members             = new HashMap<Class,LinkedList<String>>();
        mayThrowExceptions  = false;
        usesAdapters        = false;
        if (doClasses(true, true, classes)) {
            // second pass with the real writer
            out = writer != null ? writer : new PrintWriter(file);
            doClasses(mayThrowExceptions, usesAdapters, classes);
            return true;
        }
        return false;
    }