Of course they had to change the way you restart interfaces in Ubuntu 14.04. Here is how to restart your interface. Make sure you select the correct interface, the example below is for eth0. You can check you interface name in ifconfig.
ifdown eth0 && ifup eth0
To add DNS after adding a static IP you will need to set your name servers in /etc/resolvconf/resolv.conf.d/base
Example:
nameserver 8.8.8.8 nameserver 8.8.4.4
Update resolvconf
resolvconf -u
Then restart resolvconf for shits and giggles
service resolvconf restart