This file is an Eclipse update zip to be used from within an Eclipse installations update manager.

Do not unzip this zip into Eclipse directly nor into its dropins folder - it will not work. 

In fact, you do not need to unzip this zip at all - you can simply use the Eclipse Update Manager 
( Help > Install New Software... > Add... > Archive... ) to perform the installation directly from 
this zip file.

For more information, see https://www.jboss.org/tools/download/installation/update_3_3.html#fromzip

