Tiny improvements

src/gr/auth/ee/computer_networks/networkTests/Vehicle.java

@@ -169,7 +169,7 @@ public class Vehicle extends SwingWorker<Void, Void> {
 		} catch (FileNotFoundException exception) {
 			exception.printStackTrace();
 			testSuccess = false;
-			testStatusOutput = "Echo file open failure!";
+			testStatusOutput = "Vehicle file open failure!";
 			return null;
 		}
 

src/output/keepMeAlive

@@ -0,0 +1 @@
+This file exists just so I can push the output directory to git. Without this folder the program crashes.