As i understand the question correctly, FDM / FMC is only Mananges the Devices, the main VPN tunnel will be on the devices.
FMC give you flexibility maintain central database for change and pushing the policies across several FTD's across network or global.
if you have single device FDM can do the task for you. (again the URL provided no longer valid, not sure what you referring here).
If this not the case can you explain more. so it addressed properly.