code: protected List<File> findEntityClassFiles() throws MojoExecutionException {
          try {
              return FileUtils.getFiles(classes, includes, excludes);
          } catch (IOException e) {
              throw new MojoExecutionException("Error while scanning for '" + includes + "' in " + "'"
                      + classes.getAbsolutePath() + "'.", e);
          }
      }
docs: Locates and returns a list of class files found under specified class
  directory.
  
  @return list of class files.
  @throws MojoExecutionException if there was an error scanning class file
  resources.