title: convert dynamic web project to maven project
body: <p>I try to create a dynamic web project in eclipse and convert this project to a maven project. My project has this structure </p>
  
  <pre><code>src\main\java
  src\main\resources
  src\main\webapp
  src\main\test
  </code></pre>
  
  <p>When i do Right click on the project > Configure > Convert to Maven Project, I get this error message :</p>
  
  <pre><code>Errors occurred during the build.
  Errors running builder 'Maven Project Builder' on project 'Gestion'.
  Could not calculate build plan: Plugin org.apache.maven.plugins:maven-war-plugin:2.3 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-war-plugin:jar:2.3
  Plugin org.apache.maven.plugins:maven-war-plugin:2.3 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-war-plugin:jar:2.3
  Could not calculate build plan: Plugin org.apache.maven.plugins:maven-war-plugin:2.3 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-war-plugin:jar:2.3
  Plugin org.apache.maven.plugins:maven-war-plugin:2.3 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-war-plugin:jar:2.3
  </code></pre>