diff --git a/maven-plugin-tools-generators/src/main/java/org/apache/maven/tools/plugin/generator/PluginDescriptorGenerator.java b/maven-plugin-tools-generators/src/main/java/org/apache/maven/tools/plugin/generator/PluginDescriptorGenerator.java
index 4c2a4bf..477d192 100644
--- a/maven-plugin-tools-generators/src/main/java/org/apache/maven/tools/plugin/generator/PluginDescriptorGenerator.java
+++ b/maven-plugin-tools-generators/src/main/java/org/apache/maven/tools/plugin/generator/PluginDescriptorGenerator.java
@@ -105,8 +105,7 @@ public class PluginDescriptorGenerator
             // write plugin-help.xml help-descriptor
             MavenProject mavenProject = request.getProject();
             String pluginHelpFilePath =
-                "META-INF/maven/" + mavenProject.getGroupId() + "/" + mavenProject.getArtifactId()
-                    + "/plugin-help.xml";
+                "META-INF/maven/" + mavenProject.getGroupId() + "/" + mavenProject.getArtifactId() + "/plugin-help.xml";
             f = new File( request.getProject().getBuild().getOutputDirectory(), pluginHelpFilePath );
             writeDescriptor( f, request, true );
         }
@@ -153,8 +152,8 @@ public class PluginDescriptorGenerator
 
             XMLWriter w = new PrettyPrintXMLWriter( writer, encoding, null );
 
-            w.writeMarkup( "\n<!-- Generated by maven-plugin-tools " + getVersion() + " on "
-                + new SimpleDateFormat( "yyyy-MM-dd" ).format( new Date() ) + " -->\n\n" );
+            w.writeMarkup( "\n<!-- Generated by maven-plugin-tools " + getVersion() + " on " + new SimpleDateFormat(
+                "yyyy-MM-dd" ).format( new Date() ) + " -->\n\n" );
 
             w.startElement( "plugin" );
 
@@ -174,7 +173,8 @@ public class PluginDescriptorGenerator
             {
                 GeneratorUtils.element( w, "isolatedRealm", String.valueOf( pluginDescriptor.isIsolatedRealm() ) );
 
-                GeneratorUtils.element( w, "inheritedByDefault", String.valueOf( pluginDescriptor.isInheritedByDefault() ) );
+                GeneratorUtils.element( w, "inheritedByDefault",
+                                        String.valueOf( pluginDescriptor.isInheritedByDefault() ) );
             }
 
             w.startElement( "mojos" );
@@ -218,8 +218,8 @@ public class PluginDescriptorGenerator
     }
 
     /**
-     * @param mojoDescriptor   not null
-     * @param w                not null
+     * @param mojoDescriptor not null
+     * @param w              not null
      * @param helpDescriptor will clean html content from description fields
      */
     protected void processMojoDescriptor( MojoDescriptor mojoDescriptor, XMLWriter w, boolean helpDescriptor )
@@ -260,14 +260,16 @@ public class PluginDescriptorGenerator
 
         if ( StringUtils.isNotEmpty( mojoDescriptor.isDependencyResolutionRequired() ) )
         {
-            GeneratorUtils.element( w, "requiresDependencyResolution", mojoDescriptor.isDependencyResolutionRequired() );
+            GeneratorUtils.element( w, "requiresDependencyResolution",
+                                    mojoDescriptor.isDependencyResolutionRequired() );
         }
 
         // ----------------------------------------------------------------------
         //
         // ----------------------------------------------------------------------
 
-        GeneratorUtils.element( w, "requiresDirectInvocation", String.valueOf( mojoDescriptor.isDirectInvocationOnly() ) );
+        GeneratorUtils.element( w, "requiresDirectInvocation",
+                                String.valueOf( mojoDescriptor.isDirectInvocationOnly() ) );
 
         // ----------------------------------------------------------------------
         //
@@ -431,7 +433,7 @@ public class PluginDescriptorGenerator
             if ( extendedMojoDescriptor.getDependencyCollectionRequired() != null )
             {
                 GeneratorUtils.element( w, "requiresDependencyCollection",
-                                     extendedMojoDescriptor.getDependencyCollectionRequired() );
+                                        extendedMojoDescriptor.getDependencyCollectionRequired() );
             }
 
             GeneratorUtils.element( w, "threadSafe", String.valueOf( extendedMojoDescriptor.isThreadSafe() ) );
@@ -538,8 +540,8 @@ public class PluginDescriptorGenerator
 
                     GeneratorUtils.element( w, "description", parameter.getDescription(), helpDescriptor );
 
-                    if ( StringUtils.isNotEmpty( parameter.getDefaultValue() )
-                        || StringUtils.isNotEmpty( parameter.getExpression() ) )
+                    if ( StringUtils.isNotEmpty( parameter.getDefaultValue() ) || StringUtils.isNotEmpty(
+                        parameter.getExpression() ) )
                     {
                         configuration.add( parameter );
                     }
@@ -627,7 +629,7 @@ public class PluginDescriptorGenerator
 
     /**
      * Get the expression value, eventually surrounding it with <code>${ }</code>.
-     * 
+     *
      * @param parameter the parameter
      * @return the expression value
      */
@@ -663,15 +665,22 @@ public class PluginDescriptorGenerator
             rewriteHelpClassFile.getParentFile().mkdirs();
         }
 
+        FileInputStream fileInputStream = null;
+
         ClassReader cr = null;
         try
         {
-            cr = new ClassReader( new FileInputStream( helpClassFile ) );
+            fileInputStream = new FileInputStream( helpClassFile );
+            cr = new ClassReader( fileInputStream );
         }
         catch ( IOException e )
         {
             throw new GeneratorException( e.getMessage(), e );
         }
+        finally
+        {
+            IOUtil.close( fileInputStream );
+        }
 
         ClassWriter cw = new ClassWriter( 0 );