| CategoryPaths | Class CategoryPaths converts dot paths to real paths and also finds server paths and browser urls to the configured root media directory where all our media files are stored at. |
| Manager | Class Manager manages categories. |
| ResponseHandler | Class ResponseHandler handles the controller side of managing categories. |
Exceptions
| CategoryAlreadyExistsException | Class CategoryAlreadyExistsException is thrown whenever the Categories/Manager finds a duplicate category. |