title: Unable to generate cloud endpoint class
body: <p>Dear fellow programmers,</p>
  
  <p>I am very new to programming and i am following the tutorial on using app engine backend tutorial. However i face some problem along the way.</p>
  
  <p>I have Setup App Engine Backend Application Project, created a CheckIn entity class.
  After which, i follow the instruction to create a new class with the name CheckInEndPoint.java
  I copy the code from the snippet over to the Class.</p>
  
  <p>When i try to Generate Cloud Endpoint Class, i faced an error message.
  Error Generating API
  This is not a JDO/JPA entity class.</p>
  
  <p>Kindly seek your advice on how to troubleshoot it.</p>
  
  <p><a href="https://cloud.google.com/developers/articles/how-to-build-mobile-app-with-app-engine-backend-tutorial#ecdp" rel="noreferrer">https://cloud.google.com/developers/articles/how-to-build-mobile-app-with-app-engine-backend-tutorial#ecdp</a></p>