title: Cannot initialize module TreeWalker during the build in Eclipse
body: <p>I'm performing Project-Clean... in Eclipse Mars and getting the following error</p>
  
  <pre><code>   Errors occurred during the build.
       Errors running builder 'Checkstyle Builder' on project 'MyProject'.
          cannot initialize module TreeWalker - Unable to instantiate 
          'RedundantThrows' class, it is also not possible to instantiate it as 
          com.puppycrawl.tools.checkstyle.checks.annotation.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.checks.blocks.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.checks.coding.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.checks.design.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.checks.header.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.checks.imports.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.checks.indentation.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.checks.javadoc.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.checks.metrics.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.checks.modifier.RedundantThrows,
          com.puppycrawl.tools.checkstyle.checks.naming.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.checks.regexp.RedundantThrows,
          com.puppycrawl.tools.checkstyle.checks.sizes.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.checks.whitespace.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.checks.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.filters.RedundantThrows, 
          com.puppycrawl.tools.checkstyle.RedundantThrows. Please recheck that class name 
          is specified as canonical name or read how to configure short name usage 
          http://checkstyle.sourceforge.net/config.html#Packages. Please also recheck that 
          provided ClassLoader to Checker is configured correctly.
  </code></pre>
  
  <p>The CheckStyle plugin version is 6.11.
  Could you please help me figuring out what may cause this error. Thanks.</p>