File list (Check if you may need any files):
WelzlSphere\classes\Circle.class
...........\.......\WSphereTester$1.class
...........\.......\WSphereTester$2.class
...........\.......\WSphereTester$3.class
...........\.......\WSphereTester$DrawPanel.class
...........\.......\WSphereTester.class
...........\classes
...........\src\Circle.java
...........\...\WSphereTester.java
...........\src
...........\WelzlSphere.iml
...........\WelzlSphere.ipr
...........\WelzlSphere.iws
...........\WelzlSphere.jar
WelzlSphere