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diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/impl/input/correction/InternalCorrector.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/impl/input/correction/InternalCorrector.java
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+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/impl/input/correction/InternalCorrector.java
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+/**
+ * <copyright> Copyright 2006 by Know-Center, Graz, Austria </copyright>
+ * PDF-AS has been contracted by the E-Government Innovation Center EGIZ, a
+ * joint initiative of the Federal Chancellery Austria and Graz University of
+ * Technology.
+ *
+ * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
+ * the European Commission - subsequent versions of the EUPL (the "Licence");
+ * You may not use this work except in compliance with the Licence.
+ * You may obtain a copy of the Licence at:
+ * http://www.osor.eu/eupl/
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the Licence is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Licence for the specific language governing permissions and
+ * limitations under the Licence.
+ *
+ * This product combines work with different licenses. See the "NOTICE" text
+ * file for details on the various modules and licenses.
+ * The "NOTICE" text file is part of the distribution. Any derivative works
+ * that you distribute must include a readable copy of the "NOTICE" text file.
+ */
+package at.gv.egiz.pdfas.impl.input.correction;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+import at.gv.egiz.pdfas.exceptions.ErrorCode;
+import at.gv.egiz.pdfas.exceptions.framework.CorrectorException;
+import at.gv.egiz.pdfas.framework.input.PdfDataSource;
+import at.gv.egiz.pdfas.framework.input.correction.Corrector;
+import at.gv.egiz.pdfas.impl.input.ByteArrayPdfDataSourceImpl;
+import at.gv.egiz.pdfas.utils.PDFASUtils;
+import at.knowcenter.wag.egov.egiz.exceptions.PDFDocumentException;
+
+import com.lowagie.text.DocumentException;
+import com.lowagie.text.pdf.PdfReader;
+import com.lowagie.text.pdf.PdfStamper;
+
+/**
+ * Corrects a document using iText.
+ * 
+ * @author wprinz
+ */
+public class InternalCorrector implements Corrector
+{
+
+  /**
+   * @see at.gv.egiz.pdfas.framework.input.correction.Corrector#correctDocument(at.gv.egiz.pdfas.framework.input.PdfDataSource)
+   */
+  public PdfDataSource correctDocument(PdfDataSource document) throws CorrectorException
+  {
+    try
+    {
+      byte[] pdf = document.getAsByteArray();
+      PdfReader reader = new PdfReader(pdf);
+      PDFASUtils.checkReaderPermissions(reader);
+
+      ByteArrayOutputStream baos = new ByteArrayOutputStream(pdf.length);
+
+      PdfStamper stamper = new PdfStamper(reader, baos, '\0', false);
+      stamper.close();
+
+      baos.close();
+      byte[] corrected_pdf = baos.toByteArray();
+
+      return new ByteArrayPdfDataSourceImpl(corrected_pdf);
+    }
+    catch (DocumentException e)
+    {
+      throw new CorrectorException(ErrorCode.CORRECTOR_EXCEPTION, e);
+    }
+    catch (IOException e)
+    {
+      throw new CorrectorException(ErrorCode.CORRECTOR_EXCEPTION, e);
+    } catch (PDFDocumentException e) {
+      throw new CorrectorException(e.getErrorCode(), e);
+   }
+  }
+
+}