title: Maven plugin Build Helper not creating new directories in Spring Tool Suite workspace
body: <p>I'm looking to follow the advice in the book Spring in Practice chapter 10 on creating separate directories for unit tests and integration tests using the Build Helper plugin in Maven. I'm working in Spring Tool Suite trying to add integration tests to a Spring project. I configured the plugin as follows:</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;version&gt;1.9.1&lt;/version&gt;
      &lt;executions&gt;
          &lt;execution&gt;
              &lt;id&gt;add-it-source&lt;/id&gt;
              &lt;phase&gt;generate-sources&lt;/phase&gt;
              &lt;goals&gt;
                  &lt;goal&gt;add-test-source&lt;/goal&gt;
              &lt;/goals&gt;
              &lt;configuration&gt;
                  &lt;sources&gt;
                      &lt;source&gt;src/it/java&lt;/source&gt;
                  &lt;/sources&gt;
              &lt;/configuration&gt;
          &lt;/execution&gt;
          &lt;execution&gt;
              &lt;id&gt;add-it-resource&lt;/id&gt;
              &lt;phase&gt;generate-sources&lt;/phase&gt;
              &lt;goals&gt;
                  &lt;goal&gt;add-test-resource&lt;/goal&gt;
              &lt;/goals&gt;
              &lt;configuration&gt;
                  &lt;resources&gt;
                      &lt;resource&gt;
                          &lt;directory&gt;src/it/resources&lt;/directory&gt;
                      &lt;/resource&gt;
                  &lt;/resources&gt;
              &lt;/configuration&gt;
          &lt;/execution&gt;
      &lt;/executions&gt;
  &lt;/plugin&gt;
  </code></pre>
  
  <p>I run the build using clean and I try it again just using compile. I receive the following on my console screen:</p>
  
  <pre><code>[INFO] Scanning for projects...
  [INFO] 
  [INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1
  [INFO]                                                                         
  [INFO] ------------------------------------------------------------------------
  [INFO] Building wellness Maven Webapp 0.0.1-SNAPSHOT
  [INFO] ------------------------------------------------------------------------
  [INFO] 
  [INFO] --- build-helper-maven-plugin:1.9.1:add-test-source (add-it-source) @ wellness ---
  [INFO] Test Source directory: /Users/walk12/Documents/workspace-sts/wellness/src/it/java added.
  [INFO] 
  [INFO] --- build-helper-maven-plugin:1.9.1:add-test-resource (add-it-resource) @ wellness ---
  [INFO] 
  [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ wellness ---
  [WARNING] Using platform encoding (US-ASCII actually) to copy filtered resources, i.e. build is platform dependent!
  [INFO] Copying 4 resources
  [INFO] 
  [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ wellness ---
  [INFO] Changes detected - recompiling the module!
  [WARNING] File encoding has not been set, using platform encoding US-ASCII, i.e. build is platform dependent!
  [INFO] Compiling 6 source files to /Users/walk12/Documents/workspace-sts/wellness/target/classes
  [WARNING] /Users/walk12/Documents/workspace-sts/wellness/src/main/java/com/kylewalker/wellness/data/EmployeeDaoJdbcImpl.java: /Users/walk12/Documents/workspace-sts/wellness/src/main/java/com/kylewalker/wellness/data/EmployeeDaoJdbcImpl.java uses unchecked or unsafe operations.
  [WARNING] /Users/walk12/Documents/workspace-sts/wellness/src/main/java/com/kylewalker/wellness/data/EmployeeDaoJdbcImpl.java: Recompile with -Xlint:unchecked for details.
  [INFO] ------------------------------------------------------------------------
  [INFO] BUILD SUCCESS
  [INFO] ------------------------------------------------------------------------
  [INFO] Total time: 3.374 s
  [INFO] Finished at: 2014-10-18T07:48:37-07:00
  [INFO] Final Memory: 15M/153M
  [INFO] ------------------------------------------------------------------------`
  </code></pre>
  
  <p>It's saying that "/Users/walk12/Documents/workspace-sts/wellness/src/it/java added", but nothing seems to change in my actual file structure. I should be seeing "src/it/java" somewhere, correct? Instead, even after closing and opening the project and hitting Refresh, all I get is: <img src="https://i.stack.imgur.com/qnuNE.png" alt="enter image description here"></p>