I found a way to get a list of all events:
Lua Code:
if not APIDocumentation then
LoadAddOn("Blizzard_APIDocumentation");
end
local allEvents = APIDocumentation:GetAPITableByTypeName("event")
for k, v in pairs(allEvents) do
print(k, v.LiteralName)
end
So now I can check my events before I call RegisterEvent() :-)