Vim support for the ER file format.
" Add this line in vim-plug section:
Plug 'flniu/er.vim'
" Then run commands in vim:
:so %
:PlugInstallcd ~/.vim/bundle
git clone --depth=1 https://github.com/flniu/er.vim.git