Demand service code documentation

src/com/shashi/service/impl/DemandServiceImpl.java

@@ -10,20 +10,25 @@
 import com.shashi.beans.DemandBean;
 import com.shashi.service.DemandService;
 import com.shashi.utility.DBUtil;
-
+//This class is to process the demand items which are
+//not available at the time of purchase by any customer
+//the customer will receive mail once the product is avaible
+//back into the store
 public class DemandServiceImpl implements DemandService {
 
 	@Override
 	public boolean addProduct(String userId, String prodId, int demandQty) {
 		boolean flag = false;
 
+		//get the database connection
 		Connection con = DBUtil.provideConnection();
 
 		PreparedStatement ps = null;
 		PreparedStatement ps2 = null;
 		ResultSet rs = null;
 
 		try {
+			//create the prepared statement with the query
 			ps = con.prepareStatement("select * from user_demand where username=? and prodid=?");
 
 			ps.setString(1, userId);
@@ -58,7 +63,7 @@ public boolean addProduct(String userId, String prodId, int demandQty) {
 		DBUtil.closeConnection(ps);
 		DBUtil.closeConnection(ps2);
 		DBUtil.closeConnection(rs);
-
+		//return true if the product is added into the db
 		return flag;
 	}