The important things with endings of stories is they have to be the right ones for the tales being told. "Right" in terms of being satisfactory so your reader feels the story could not have ended any other way.
I find it helpful, once I've written a piece and put it aside for a while, to come back and read it as if I was the reader coming across the tale. One of my edits is to specifically look for anything that might "trip" a reader up and one big area here is examining the ending of the story carefully. Could a reader find fault with it? While accepting you can't please everybody, if you can look at the way your tale ends and feel genuinely most readers would accept that ending, then yes they will and the ending is appropriate. Asking trusted readers to come back to you with their thoughts can be really useful too.