Emenike, 24, signed the contract reportedly worth around 7 million euros, on Wednesday, to end speculation about his future.   The fee will rise to 9 million euros if Emenike moves from Fenerbahce.   The Nigerian joined Karabukspor from FC Cape Town in 2009. His 16 goals were a key factor as the club not only secured promotion to the Turkish Super Lig, but also claimed the first division title.   He also picked up the award for the best foreign player.   Fourteen goals in his first season in the Turkish Super Lig was enough to see his stock rise, with admiring glances coming from as far afield as Germany and Italy.   But the Nigerian has opted to remain, in Turkey, where he will join international skipper Joseph Yobo at the Istanbul giants.