File list (Check if you may need any files):
Exer2\.classpath
.....\.project
.....\.settings\org.eclipse.jdt.core.prefs
.....\bin\com\domain\Goods.class
.....\...\...\observer\CustomerAImpl.class
.....\...\...\........\CustomerBImpl.class
.....\...\...\........\IObserver.class
.....\...\...\subject\ISubject.class
.....\...\...\.......\ShopSubjectImpl.class
.....\...\...\test\Application.class
.....\src\com\domain\Goods.java
.....\...\...\observer\CustomerAImpl.java
.....\...\...\........\CustomerBImpl.java
.....\...\...\........\IObserver.java
.....\...\...\subject\ISubject.java
.....\...\...\.......\ShopSubjectImpl.java
.....\...\...\test\Application.java
.....\bin\com\domain
.....\...\...\observer
.....\...\...\subject
.....\...\...\test
.....\src\com\domain
.....\...\...\observer
.....\...\...\subject
.....\...\...\test
.....\bin\com
.....\src\com
.....\.settings
.....\bin
.....\src
Exer2