It appears that when we leave the javadoc of an Implementing classes method(s), that we are not getting all the throws clauses that we should be.
javax.faces.validator.MethodExpressionValidator implements the javax.faces.components.Stateholder interface, and implements saveState & restoreState methods. The API documents for these methods are copied automatically fro the StateHolder interface javadocs, but the "throws" clause is not being copied. We might need to implicitly tell the javadoc too do do this by adding something like the below.
I have attached a file that contains a list of classes that have the "Description copied from" string in there Javadoc at some point. This file should help whom ever needs to go through and clean up the classes.