Hello Peri,
you have to install the Modeling Tools for SAP BW powered by SAP HANA. You can use them with Eclipse Luna or Mars or a SAP HANA Studio version >= SP08. For details check the installation guide of the tools (http://help.sap.com/download/netweaver/bwmt/SAP_BW_Modeling_Tools_Installation_Guide_en.pdf).
Best Regards,
Florian