CTF Tools are designed to give you a little bit of a leg-up in your 7893 project by supplying important code that you mightn't be prepared to start writing right away. This code will help you with the following areas:
Besides this high-level description, it will also be instructive to read the automatically-generated Javadoc.
The all the class files and javadoc are included in the jar file: ctf_tools.jar. Once you've downloaded the jar, add it to your project. In eclipse use the "Add External JARs" button on the project properties dialog: