adding more detail to class diagram

Sorting/ClassDiagram.md

@@ -33,6 +33,12 @@ classDiagram
         #sort() void
     }
 
-    class RandomNumberFileMaker
+    class RandomNumberFileMaker{
+		-String filname
+		-int count
+		-int max
+		-int min
+		+writeFile(): void
+	}
 
 ```