test persist file return correct implement test persist file persist manag persist persist manag instanc file persist test persist test unknown file test persist persist persist file unknown foo test persist test project readabl file test persist persist persist file unknown zargo file persist extens test persist test persist persist persist file unknown xmi file persist extens test persist test persist persist persist file unknown xml file persist extens test persist test persist persist persist file unknown uml file persist extens test persist test persist persist persist file unknown zip file persist extens test persist 