@startuml

(*) --> "Get path to the file to import"
	--> if "File exists and is valid XML"
		--> [Yes] "Unserialize file"
		--> if "Error of name, type or order during unserialization"
			--> [Yes] "Display error message"
		else
			--> [No] "Create related objects in DB"
			--> (*)
		endif
	else
		--> [No] "Display error message"
		--> (*)
	endif

@enduml