renamed:    src/com/paris7/adb/tp6/DataManager.java -> src/com/paris7/adb/tp6/business/DataManager.java
	new file:   src/com/paris7/adb/tp6/business/JoinMaker.java
	renamed:    src/com/paris7/adb/tp6/RGenerator.java -> src/com/paris7/adb/tp6/business/RGenerator.java