Installing anypoint studio should be a straight forward process, according to the official documentation on the mulesoft website. You add mulesoft to the list of available software site, select anypoint studio, click finish. Eclipse install software wizard should, theoretically, pull in required dependencies.
However, it didn’t work. I got the following exception
No repository found containing: osgi.bundle,org.eclipse.m2e.archetype.common,1.6.2.20150902-0001
….
I had a Java EE installation of Eclipse Mars (4.5). It already included maven support via m2e-wtp. Anypoint studio wasn’t happy with this version of m2e, and was also unable to pull in the required version of m2e itself. I had to manually add m2e’s update site http://download.eclipse.org/technology/m2e/releases and install m2e. After that, anypoint studio was installed without a problem.