Refactored solutions

Java/Introduction/Java Stdin and Stdout I/Solution.java

@@ -1,13 +1,15 @@
-import java.util.*;
+import java.util.Scanner;
 
 public class Solution {
-
     public static void main(String[] args) {
+        /* Read and save input */
         Scanner scan = new Scanner(System.in);
         int a = scan.nextInt();
         int b = scan.nextInt();
         int c = scan.nextInt();
-
+        scan.close();
+        
+        /* Print data */
         System.out.println(a);
         System.out.println(b);
         System.out.println(c);