Applescript: return focus to another app after script runs

I'm currently running the following script via Hazel to back up plain text notes in a specific folder to Evernote:

tell application "Evernote"

activate

create note from file theFile notebook {"!inbox"} tags {"to review"}

end

Is there any way to do this so it happens in the background i.e. returns focus to whatever app was active when the script is triggered?

Thanks in advance for any responses.