Add plate well concentrations to output data

src/main/java/UserInterface.java

@@ -499,7 +499,7 @@ public class UserInterface {
             System.out.println("No cell sample found.");
             System.out.println("Returning to main menu.");
         }
-        else if(plate.getWells().size() == 0){
+        else if(plate.getWells().size() == 0 || plate.getConcentrations().length == 0){
             System.out.println("No sample plate found.");
             System.out.println("Returning to main menu.");
         }