sarajevo bosnia must start make concrete reform want join european union window become member could close bloc enlargement chief say monday european union accept bosnia application 15 months ago johannes hahn say balkan nation make reform change agree bloc international creditors far nothing deliver expect concrete result hahn say meet political leaders bosnia prime minister denis zvizdic say hop leaders would reach compromise outstanding issue late month early january ethnically divide country far manage respond initial eu questionnaire readiness join bloc political bicker hold law raise excise tax fuel require unlock external finance infrastructure project also sign development energy agriculture sector strategies demand bloc lot issue pipeline would like pipeline say hahn absolutely high time deliver agree otherwise window close something would like see tell news conference hahn urge government opposition leaders stop appeal ethnic nationalism say eu would look evidence european value include respect court rule without understand one make progress say bosnia must make reform eu window could close hahn