My first tab, so take it easy on me!! :) it allows for a bit of improv here and there aswell.
Fairly easy, Sounds right, or sounds great anyway...enjoy!

Riff 1, during verses -


E¦---------------------------------------------------|
B¦------0---1---------------2------------------------|
G¦----1---1---1---1---1---1---2---2-----2-------2----|
D¦--2-----------2---2---2-------2-----4---4---4---4--|
A¦----------------------------------4-------4--------|
E¦---------------------------------------------------|

Riff 2, in the pre-chorus

E¦------------------------------------------------4--|
B¦------0---1---------------2-------------------5----|
G¦----1---1---1---1---1---1---2---2-----2---4-5------|
D¦--2-----------2---2---2-------2-----4---4----------|
A¦----------------------------------4----------------|
E¦---------------------------------------------------|

Have fun!