Finally you have done it.
Need not to worry about the open socket. It is not necessary to cover it at least in alto . you can use your adapter and can keep it plugged. There is a trick also. when you are not using the charger or adapter but want to keep it in the socket ,you can pull it a little bit outside ,it will disconnect the power but your adapter will be remain plugged in the socket. It will save energy and your adapter or charger will last longer.