title: Why does the maven Group Id changes from version to another
body: <p>I was wondering why the group Id changes in Maven projects from one version to another. Example the project HSQLDB version up to 1.8.0.7:</p>
  
  <pre><code>&lt;groupId&gt;hsqldb&lt;/groupId&gt;
  &lt;artifactId&gt;hsqldb&lt;/artifactId&gt;
  &lt;version&gt;1.8.0.2&lt;/version&gt;
  </code></pre>
  
  <p>Afterwards :</p>
  
  <pre><code>&lt;groupId&gt;org.hsqldb&lt;/groupId&gt;
  &lt;artifactId&gt;hsqldb&lt;/artifactId&gt;
  &lt;version&gt;2.2.6&lt;/version&gt;
  </code></pre>
  
  <p>The group id changes from <code>hsqldb</code> to <code>org.hsqldb</code>. Why? It is to warn us that this won't be backward compatible?</p>
  
  <p>Thanks!</p>