Actually, the Workflows may just not appear before clearing the caches. That happened to me once. As far as I know there are no tutorials on payment gateways. One way of doing Bankeinzug may just be to take any of the existing payment gateways like SIPS, and simulate a fake 'OK' callback from the 'Bank'... That worked for me when I wrote a cheque payment gateway. Unfortunately I made so many business specific changes on that one that I can't post it as a contribution. But first have a look at the caches, that may just be the problem.
Hi,
i solved the Problem by googling and anaylzing the Kernel Workflow Events. I figured out that in 3.7 addon settings doesn't and with php for ex. workow.ini.append now it is site.ini.append.php