changed to FileManager inteface and establishment of an abstract file manager hierarchy
JavaDoc updates for FileManager hierarchy
change to a method name in BasicFileManager abstract class
Method renames in the FileManager hierarchy.
Numerous changes to FileManager hierarchy, including a stub for the SwingWorker type to be returned by methods of the "SwingWorkerFileManagerment" class and (incomplete) JUnit tests for this class.  The project compiles and tests successfully with Ant.  Just wanted to get this hierarchy nailed down a bit more whereas I injected a small amount of code into the hierarchy's abstract class yesterday and wanted to start some tests for it "like yesterday".
Merge pull request #4 from JeffBlodgett/BusinessLogicInterfaceRefinement

Business logic interface refinement