Get parse tree of a sentence using OpenNLP. Getting stuck with example.

OpenNLP is an Apache project on Natural Language Processing. One of the aims of an NLP program is to parse a sentence giving a tree of its grammatical structure. For example, the sentence "The sky is blue." might be parsed as

      S
     / \
   NP   VP
  / \    | \
The sky is blue.

where S is Sentence, NP is Noun-phrase, and VP is Verb-phrase. Equivalently the above tree can be written down as a parenthesized string like this: S(NP(The sky) VP(is blue.))

I am trying to be able to get the parenthesized strings from sentences using OpenNLP, but I can't get the example code to work.

In particular, I am following along the last part of this tutorial and my code gets stuck at initializing ParserModel.

I have downloaded the appropriate binaries from here and added opennlp-tools-1.5.3.jar (which includes classes for all of the following objects) as a library to my IntelliJ project. Also, I moved en-parser-chunking.bin to my "user.dir."

The following is the code which should give me a parse tree, but it runs indefinitely at creating the ParserModel object.

    InputStream is = new FileInputStream("en-parser-chunking.bin");
    ParserModel model = new ParserModel(is);
    Parser parser = ParserFactory.create(model);
    String sentence = "The sky is blue.";
    Parse topParses[] = ParserTool.parseLine(sentence, parser, 1);
    for (Parse p : topParses)
        p.show();
    is.close();

It's my first day of working with OpenNLP, but I can't even get this simple example to work.