Comments added

Author: RohitMazumder

src/main/java/com/williamfiset/algorithms/math/NChooseRModPrime.java

@@ -1,3 +1,4 @@
+/** @author Rohit Mazumder, mazumder.rohit7@gmai.com */
 package com.williamfiset.algorithms.math;
 
 import java.math.BigInteger;
@@ -29,6 +30,7 @@ public static long compute(int N, int R, int P) {
         % P;
   }
 
+  // Method for testing output against the output generated by the compute(int,int,int) function
   private static String bigIntegerNChooseRModP(int N, int R, int P) {
     if (R == 0) return "1";
     BigInteger num = new BigInteger("1");