.vimrc

if has("autocmd")
  " remove trailing white spaces
  autocmd BufWritePre * :%s/\s\+$//e
endif

netbeans config

* Tools -> Options -> Editor -> On Save > Remove Trailing Whitespace From
* Select: All lines

rubymine config

Go to preferences / editor and check:

* Ensure line feed at file end on Save
* Strip trailing spaces on Save

sublime config

// Trims white space added by auto_indent when moving the caret off the line.
"ensure_newline_at_eof_on_save": true,
"trim_automatic_white_space": true