If you work with Maven in Eclipse, there's one default setting, which will eventually drive you mad. And that's when you open a pom.xml file, you won't see XML, but a wizard. And the worst part is, that you seldom change what is in this default page.
Usually you just want to see plain XML. How to show XML automatically when you open pom.xml file? Goto Window -> Preferences -> Maven -> User Interface -> and check "Open XML page in the POM editor by default"