Tools are structurally organized slightly different for Sakai 2.2. For a tool called "tool-name":
tool-name tool-name-api api src/java/org/sakaiproject/tool-name/api src/java/org/sakaiproject/tool-name/cover tool-name-impl impl src/bundle src/java/org/sakaiproject/tool-name/impl src/sql hsqldb mysql oracle pack /src/webapp/WEB-INF/components.xml tool-name-tool tool src/bundle src/java/org/sakaiproject/tool-name/tool src/webapp