Working with other mods?

So, basically, I have 2 mods. One adds trees that give you resources, and one that adds new types of resources.

What I want to do is make it so if you want the mod that adds resources, the first mod adds in a tree of those resources, but if you don't have that mod installed, the trees don't exist at all (because it would break everything.)

is there a way to do this with mcreator? i can go into more depth if needed