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diff --git a/pdf-over-commons/src/main/java/at/asit/pdfover/commons/Messages.java b/pdf-over-commons/src/main/java/at/asit/pdfover/commons/Messages.java
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+/*
+ * Copyright 2012 by A-SIT, Secure Information Technology Center Austria
+ *
+ * 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://joinup.ec.europa.eu/software/page/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.
+ */
+package at.asit.pdfover.commons;
+
+// Imports
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.MissingResourceException;
+import java.util.ResourceBundle;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+/**
+ * Localizes string messages for PDFOver GUI
+ */
+public class Messages {
+	
+	/**
+	 * SLF4J Logger instance
+	 **/
+	static final Logger log = LoggerFactory.getLogger(Messages.class);
+	
+	private static final String BUNDLE_NAME = "at.asit.pdfover.gui.messages"; //$NON-NLS-1$
+
+	private static HashMap<Locale, ResourceBundle> bundles = new HashMap<>();
+
+	private static Locale currentLocale = getDefaultLocale();
+	
+	private Messages() {
+	}
+
+	/**
+	 * Get the closest match to the system default Locale out of the supported locales
+	 * @return the default locale
+	 */
+	public static Locale getDefaultLocale() {
+		Locale ld = Locale.getDefault();
+		for (Locale l : Constants.SUPPORTED_LOCALES) {
+			if (l.equals(ld) || l.getLanguage().equals(ld.getLanguage()))
+				return l;
+		}
+		return Constants.SUPPORTED_LOCALES[0];
+	}
+
+	/**
+	 * Sets the currently used locals
+	 * @param locale
+	 */
+	public static void setLocale(Locale locale) {
+		currentLocale = locale;
+	}
+	
+	private static ResourceBundle getBundle(Locale locale) {
+		if(!bundles.containsKey(locale)) {
+			log.debug("Loading resource bundle for {}", locale); //$NON-NLS-1$
+			ResourceBundle tmp = null;
+			try {
+				tmp = ResourceBundle.getBundle(BUNDLE_NAME, locale);
+				log.debug("Received bundle for {}", tmp.getLocale()); //$NON-NLS-1$
+			} catch(Exception e) {
+				log.error("NO RESOURCE BUNDLE FOR {} {}", locale, e); //$NON-NLS-1$
+				tmp = ResourceBundle.getBundle(BUNDLE_NAME);
+			}
+			if(tmp == null) {
+				log.error("NO RESOURCE BUNDLE FOR {}", locale); //$NON-NLS-1$
+				tmp = ResourceBundle.getBundle(BUNDLE_NAME);
+			}
+			bundles.put(locale, tmp);
+			return tmp;
+		}
+		return bundles.get(locale);
+	}
+	
+	/**
+	 * Gets the localized message
+	 * @param key
+	 * @return the localized message
+	 */
+	public static String getString(String key) {
+		try {
+			return getBundle(currentLocale).getString(key);
+		} catch (MissingResourceException e) {
+			return '!' + key + '!';
+		}
+	}
+	
+	/**
+	 * Gets the localized message
+	 * @param key the key
+	 * @param locale the locale to use
+	 * @return the localized message
+	 */
+	public static String getString(String key, Locale locale) {
+		try {
+			return getBundle(locale).getString(key);
+		} catch (MissingResourceException e) {
+			return '!' + key + '!';
+		}
+	}
+}