To install the jSSTL Eclipse Plug-In, Eclipse for DSL and Java 1.8 are needed.
Open your copy of Eclipse for DSL, and select Help >> Install New Software.
To install the jSSTL Plug-In you need add two new repositories. The first one is to the Nebula repository while the second one refers to the jSSTL Update Site.
Click Add to open add site dialogue
Create Nebula repository and set the location to http://download.eclipse.org/technology/nebula/snapshot and press Ok.
After that press again the Add button and create a new entry for the jSSTL Update Site and set the location to https://sourceforge.net/projects/quanticol/files/jSSTL/updates/releases/
Select jSSTL Plug-In and press Next
The application will then find all the dependencies and get the plug-in for you (this can take some time as the application has to look up dependencies from other sites). After that you will be presented with installation details, just press next.
Accept the license agreement
The plugin will start to download and install.
At the end of the installation process restart Eclipse.