Auto run VirtualBox VM in background on Fedora 22 with systemd

Recently, I discovered that VirtualBox has a headless mode, where you can run a VM in background. You can start a VM in background with this command,

VBoxManage startvm Win7 --type headless

Win7 is the name of the VM

You can also save the state of a VM with this command,

VBoxManage controlvm Win7 savestate

So, I wrote a systemd service file so as to start and stop the VM automatically.

[Unit]
Description=Vbox for win7
After=network.target multi-user.target vboxdrv.service

[Service]
Type=forking
ExecStart=/usr/bin/VBoxManage startvm Win7 --type headless
ExecStop=/usr/bin/VBoxManage controlvm Win7 savestate
TimeoutSec=60

[Install]
WantedBy=default.target

Put this file as vbox.service in ~/.config/systemd/user/ and use systemctl --user to manage the service.