This is probably played with a capo on the 2nd fret, but is transcribed to play without.

Main Riff:

   A                               C                   D       C   
e | --------------------------------------------------------------- | 
B | -----------------------------------------------------3--------- | 
G | ---2-------0---2---2-------0---------2-------0---2-----------0- | 
D | -------2---------------2-----------------2-----0---0-----2----- | 
A | -0---0---0---0---0---0---0----0h3--3---3---3-----------0---0--- | 
A | --------------------------------------------------------------- | 


Chorus:

  A        D                  E     G  G 
  So, what difference does it make 

  So, what difference does it make ?

  F#m      D   E   
  It makes none
  F#m              D   E   
  But now you have gone
          F#m             D    E           -> Riff
  And you must be looking very old tonight 




 |  /  slide up
 |  \  slide down
 B  hammer-on
 |  p  pull-off
 |  ~  vibrato
 |  +  harmonic
 |  x  Mute note