File list (Check if you may need any files):
Observer\.classpath
........\.project
........\.settings\org.eclipse.jdt.core.prefs
........\bin\Cat.class
........\...\edu\BlackBoard.class
........\...\...\Computer.class
........\...\...\Monitor.class
........\...\...\Observer.class
........\...\...\Test.class
........\...\GreyMouse.class
........\...\Observer.class
........\...\Test.class
........\...\WhiteMouse.class
........\src\Cat.java
........\...\edu\BlackBoard.java
........\...\...\Computer.java
........\...\...\Monitor.java
........\...\...\Observer.java
........\...\...\Test.java
........\...\GreyMouse.java
........\...\Observer.java
........\...\Test.java
........\...\WhiteMouse.java
........\bin\edu
........\src\edu
........\.settings
........\bin
........\src
Observer