AbstractRule would benefit from some java doc. When do I likely want to use it? ...
MagnoliaContentProcessor - javadoc again. The "Magnolia specific implementation of TagBasedContentProcessor which offers possibility of configuration via Magnolia admincentral config tree." doesn't really say anything unless I already know what TBCP does at which point I most likely don't need to read the javadoc for MCP.
TagRuleBundle - ditto. Javadoc can use some love.
MagnoliaHttpServletRequestFilterable
not clear what this is for from the javadoc and
MagnoliaWebAppContext - commented out code & javadoc should explain how/when is this context used