[Added] created method for CouponListManager

app/src/main/java/com/a1/nextlocation/recyclerview/CouponListManager.java

@@ -1,4 +1,23 @@
 package com.a1.nextlocation.recyclerview;
 
+import com.a1.nextlocation.data.Coupon;
+
+import java.util.List;
+
 public class CouponListManager {
+
+    private List<Coupon> coupon;
+
+    public CouponListManager(){
+
+    }
+
+    public List<Coupon> getCoupon() {
+        return coupon;
+    }
+
+    public void setCoupon(List<Coupon> location) {
+        this.coupon = coupon;
+    }
+
 }