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diff --git a/framework/main/classes/utils/class_StringUtils.php b/framework/main/classes/utils/class_StringUtils.php
new file mode 100644
index 00000000..25e3cdbf
--- /dev/null
+++ b/framework/main/classes/utils/class_StringUtils.php
@@ -0,0 +1,74 @@
+<?php
+// Own namespace
+namespace Org\Mxchange\CoreFramework\String\Utils;
+
+// Import framework stuff
+use Org\Mxchange\CoreFramework\Configuration\FrameworkConfiguration;
+use Org\Mxchange\CoreFramework\Generic\NullPointerException;
+use Org\Mxchange\CoreFramework\Object\BaseFrameworkSystem;
+
+// Import SPL stuff
+use \InvalidArgumentException;
+
+/**
+ * A string utility class
+ *
+ * @author		Roland Haeder <webmaster@ship-simu.org>
+ * @version		0.0.0
+ * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 Core Developer Team
+ * @license		GNU GPL 3.0 or any newer version
+ * @link		http://www.ship-simu.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+final class StringUtils extends BaseFrameworkSystem {
+	/**
+	 * Private constructor, no instance needed
+	 *
+	 * @return	void
+	 */
+	private function __construct () {
+		// Call parent constructor
+		parent::__construct(__CLASS__);
+	}
+
+	/**
+	 * Converts dashes to underscores, e.g. useable for configuration entries
+	 *
+	 * @param	$str	The string with maybe dashes inside
+	 * @return	$str	The converted string with no dashed, but underscores
+	 * @throws	NullPointerException	If $str is null
+	 * @throws	InvalidArgumentException	If $str is empty
+	 */
+	public static function convertDashesToUnderscores ($str) {
+		// Is it null?
+		if (is_null($str)) {
+			// Throw NPE
+			throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
+		} elseif (!is_string($str)) {
+			// Entry is empty
+			throw new InvalidArgumentException(sprintf('str[]=%s is not a string', gettype($str)), FrameworkConfiguration::EXCEPTION_CONFIG_KEY_IS_EMPTY);
+		} elseif ((is_string($str)) && (empty($str))) {
+			// Entry is empty
+			throw new InvalidArgumentException('str is empty', FrameworkConfiguration::EXCEPTION_CONFIG_KEY_IS_EMPTY);
+		}
+
+		// Convert them all
+		$str = str_replace('-', '_', $str);
+
+		// Return converted string
+		return $str;
+	}
+
+}