anchor.diff:  					"jdbc:postgresql://ec2-23-21-185-168.compute-1.amazonaws.com:5432/ddbj4k4uieorq7?ssl=true&sslfactory=org.postgresql.ssl.NonValidatingFactory",
   					"qwovydljafffgl", "cGdGZam7xcem_isgwfV3FQ_jxs");
   	PreparedStatement pstmt = null, d_pstmt = null;
  -	Statement statement = null, d_statement = null;
   	ResultSet rs = null;
   	String sql = null;
   	
  
positive.code: 		<div class="row">
  				<div class="row">
  					<div class="col-sm-1">
  						<img style="height:45px" src="img/plus.png">
  					</div>
  					<div class="col-sm-2">
  							Insert new category
  					</div>
  					<div class="col-sm-3">
  						<p>
  							Insert a new category to the list
  						</p>
  					</div>
  					<div class="col-sm-4">	
  						<p>
  
negative.code: 			if(role.equals("Owner"))
  			{
  				try{					
  					PreparedStatement check_pstmt = conn.prepareStatement("SELECT name FROM categories");
  					String input_c_name = ""+request.getParameter("name");
  					ResultSet check_rs = check_pstmt.executeQuery();
  