Automatically add newline on save in PyCharm?

PyCharm 5 complains of a missing newline at the end of the file:

How do I tell PyCharm to add the newline (if missing) automatically whenever I save a file?

This can be enabled in the Editor > General settings:

From the File menu under ☰, pick Settings..., then select Editor > General. Under the On Save section in the right-hand pane, check the Ensure every saved file ends with a line break checkbox.

For older versions of PyCharm:

From the File pick Settings, then select Editor > General. Under the Other section in the right-hand pane, check the Ensure an empty line at the end of a file on Save checkbox.