For details, see the Vivado Design Suite User Guide: Designing with IP (UG896) .
The TEMAC solution delivers files into several filegroups. By default, the filegroups necessary for use of the TEMAC or opening the IP Example design are generated when the core is generated. If additional filegroups are required these can be selected using the generate option.
The filegroups generated can be seen in the IP Sources tab of the Sources window where they are listed for each IP in the project.