title: org.codehaus.mojo not visible in Eclipse
body: <p>I get an error in my pom.xml, saying:</p>
  
  <pre><code>Plugin execution not covered by lifecycle configuration: org.codehaus.mojo:build-helper-maven-plugin:1.4:add-source (execution: add-generated-sources, phase: process-sources)
  </code></pre>
  
  <p>Here is an extract of my pom.xml:</p>
  
  <pre><code>&lt;plugin&gt;
      &lt;groupId&gt;org.codehaus.mojo&lt;/groupId&gt;
      &lt;artifactId&gt;build-helper-maven-plugin&lt;/artifactId&gt;
      &lt;executions&gt;
        &lt;execution&gt;
          &lt;id&gt;add-generated-sources&lt;/id&gt;
          &lt;phase&gt;process-sources&lt;/phase&gt;
          &lt;goals&gt;
            &lt;goal&gt;add-source&lt;/goal&gt;
          &lt;/goals&gt;
          &lt;configuration&gt;
            &lt;sources&gt;
              &lt;source&gt;${project.build.directory}/generated-sources/entitygenerator&lt;/source&gt;
              &lt;source&gt;${basedir}/src/main/groovy&lt;/source&gt;
            &lt;/sources&gt;
          &lt;/configuration&gt;
        &lt;/execution&gt;
      &lt;/executions&gt;
  &lt;/plugin&gt;
  </code></pre>
  
  <p>The error is on the <code>&lt;execution&gt;</code> tag.</p>
  
  <p>Now, I'm struggling to find the need Eclipse plugin, but somehow, I'm not able to find it. Can you help?</p>
  
  <p>I'm using Eclipse Indigo and Maven 3.0.3, with a JDK 1.6_22, on a Windows XP SP3.</p>