Add RamUsage to be safe

BauSystem_Main/src/de/steamwar/bausystem/RamUsage.java

@@ -24,7 +24,7 @@ import java.lang.management.ManagementFactory;
 public class RamUsage {
 
     private RamUsage() {
-        throw new IllegalStateException("Utility Class")
+        throw new IllegalStateException("Utility Class");
     }
 
     public static double getUsage() {