File list (Check if you may need any files):
helloworld
..........\.classpath
..........\.project
..........\bin
..........\...\org
..........\...\...\upb
..........\...\...\...\hello
..........\...\...\...\.....\portlets
..........\...\...\...\.....\........\HelloWorld.class
..........\build.properties
..........\build.xml
..........\lib
..........\src
..........\...\org
..........\...\...\upb
..........\...\...\...\hello
..........\...\...\...\.....\portlets
..........\...\...\...\.....\........\HelloWorld.java
..........\webapp
..........\......\html
..........\......\jsp
..........\......\WEB-INF
..........\......\.......\classes
..........\......\.......\.......\log4j.properties
..........\......\.......\persistence
..........\......\.......\...........\hibernate.properties
..........\......\.......\portlet.xml
..........\......\.......\PortletServices.xml
..........\......\.......\web.xml