Karamarko was formally confirmed as chairman of the main committee, while Damir Krsticevic was appointed his deputy.
Karamarko said the inauguration of the party's bodies, after Sunday's intra-party elections, was completed.
He refuted claims that he now had complete control over the party.
"We simply inaugurated the vital parts of the party necessary for normal functioning. That doesn't mean getting control. I'm only the party's president, not an emperor," he said.