Tools are structurally organized slightly different for Sakai 2.2. For a tool called "tool-name":
tool-name toolname-api api src/java/org/sakaiproject/toolname/api src/java/org/sakaiproject/toolname/cover toolname-impl impl src/bundle src/java/org/sakaiproject/toolname/impl src/sql hsqldb mysql oracle pack /src/webapp/WEB-INF/components.xml toolname-tool tool src/bundle src/java/org/sakaiproject/toolname/tool src/webapp
An extra level of directory structure has been added before the src directory. Also notice the consistency of identify apis, impls, covers, and tool code. Impl is now preferred to component, which avoids confusion with the component manager, among other things.
Also note that this structure only applies to tools with application logic broken out into an application service defined by an API. Simpler tools without an application service would not require "toolname-api" or "toolname-impl" directories.