code: private static void putCachedResource( String baseName, Resources resources )
      {
          synchronized( ResourceManager.class )
          {
              WeakReference<Resources> ref = new WeakReference<Resources>( resources );
              RESOURCES.put( baseName, ref );
          }
      }
docs: Cache specified resource in weak reference.
  
  @param baseName  the resource key
  @param resources the resources object