This class save Association relationship to file
 The Abstraction will be saved as Dependency until SMarty Modeling has this relationship
 Then replace lines:
 65 :    if (r2.getId().equals("DEPENDENCY#" + id_rel)) {       to       if(r2.getId().equals("ABSTRACTION#" + id_rel)){
 72 :    dr.setId("DEPENDENCY#" + id_rel);                      to       dr.setId("ABSTRACTION#" + id_rel);
 75 :    printWriter.write("\n" + tab + "
");                      to       printWriter.write("\n"+tab+"");
 76 :    printWriter.write("\n" + tab + "");        to       printWriter.write("\n"+tab+"");
 and remove lines 77-79