And, don't get me wrong, only you can know what your intent was. But that's always true of any area of law in which intent is relevant. In the absence of mind reading machines, the way that "intent" is determined is by deciding what is most probable based on the external evidence.
Here, regardless of what you intent might be, no one is going to believe this:
Can't remember right now, but It was just a random type in, a playoff of whisky. I typed in Whesskey and seen that the .com was available so I purchased it. A few months ago as I was deleting some of my crap names I decided to look-up Whesskey to see...
And, again, please don't take this personally, but the idea that you can't quite remember why you bought the domain name in the first place, but then decided to have a look around four years after the fact to see if anyone was using it, is not a scenario that a UDRP panel is going to be believe is likely.
My question is isn't trademarks only good in the country registered but not others which I thought made it okay to reg just as long as the trademark doesn't extend to your country?
You thought it was okay when you registered it? Or did you mean you thought it was okay when you decided to contact the trademark holder? Because, and this may just be the way you've written it, it sounds as if you were aware that they were the only people who appear to have been using it as a mark, but since they were in Germany you believed that "made it okay to reg".
Did you think it was going to make them happy to hear from you, as if they would say, "Oh, look, some helpful person has registered our trademark as a .com and wants to sell it to us. What a splendid fellow he must be! This is a marvelous opportunity for us to spend money!"
Most businesses aren't interested in accumulating domain names they don't want and don't need. There are hundreds of TLDs and thousands of possible variations on trademarks, and so the argument frequently believed here on namepros of "if they wanted it, they would have registered it" doesn't go very far. They might not want to register their mark as a domain name in every TLD, but what they certainly don't want is others using domain names which correspond to their mark in ways that might harm them. So what they have told you, rather politely as these things go, is that they don't want the .com, but they will certainly protect themselves if that domain name comes to be used in a way that puts you on their radar.
I will remain fascinated by the widespread, persistent, and completely wrongheaded notion among domainers that running some search of the US Patent and Trademark database is the be-all and end-all of figuring out whether a trademark might be relevant to a domain name.
If you do, for example, a Google image search and come up with a bunch of pictures that look like this:
Then it is a pretty reliable sign that someone is using it as a trademark.
Given that it is not otherwise a dictionary word, geographic location, or a term that lends itself to any immediately obvious non-infringing uses, then it is going to be very difficult to believe the sequence of "It popped into my head when I was registering domain names, and I decided to have a look around four years later to see if anyone was using it as a mark."
So then, things take a turn for the worse. After writing to them and being informed that they aren't particularly bothered by an unused domain name, but would be concerned if it were to be used in some way, you say this:
I'm thinking I should develop it just to piss them off.
Because, yes, spending your time on an effort "just to piss them off" is a remarkably professional thing to do. They don't want to buy the domain name which was identical to their established mark at the time you registered it so, in your mind, the appropriate thing to do is to make them angry. Why? What does making other people angry do for you?
So then, to add to the apparent facts thus far, adding this one to the stack:
6. After being told they don't want to buy the domain name, but will enforce their rights if necessary, the registrant developed the domain name that had sat unused for four years, in a manner designed to "piss them off".
Well, that would seal the very strong case against you here for sure.