AWS CloudFormation Starter/`null` Template

If the CloudFormation create has an error, the CloudFormation doesn’t roll back so it has to be deleted and recreated. To avoid multiple initial create/delete, the best approach is to use a null CloudFormation. An example is below:

AWSTemplateFormatVersion: 2010-09-09
Description: CloudFormation Starter

Conditions:
  Never: !Equals [ a, b ]

Resources:
  NullResource:
    Type: Custom::Null
    Condition: Never