public EventTracer(DataServer arg_ds) { this("ET","sa","",arg_ds);
public EventTracer(String file,String usr,String pwd, DataServer arg_ds){   connectDB(file, usr, pwd);     System.out.println("EVENT TRACER STARTED.");  ds = arg_ds;  myself = this;
    public EventTracer(DataServer arg_ds) {	this("ET","sa","",arg_ds);    }