This software repository URL https://tools.hana.ondemand.com/mars provides access to SAP Development Tools for Eclipse Mars (4.5) Release.
It is intended to be used in the Help > Install New Software wizard of Eclipse. For more information about installing software, see the Eclipse Platform Help.
If you have any problems installing the software, please check the document SAP Development Tools for Eclipse Installation: FAQ and Known Issues.
The downloads are provided under the terms of the SAP DEVELOPER LICENSE AGREEMENT.