Create folder on ftp if possible
To answer your questions:


Yes if you never want to know why something went wrong. You should log the exception so you can diagnose issues later. Swallowing exceptions like that is rarely a good idea.
No. Web requests return status codes. It could be returning a 5xx error which would indicate that the directory was not created successfully but you'd be acting like it had worked. A response successfully is not the same thing as a successful response.