Watch the Smooth Sailing online guitar lesson by Brad Carlton from Chord Studies: Beginner Chords Vol. 2
This is a common rock vamp in E where you have different chords with a pedal note in the bass. If you find the Eadd9 too difficult, you can substitute it for a regular E chord at first and working your way to adding in the F♯. Let those open strings ring clearly for a nice smooth sound.