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diff --git a/src/de/lmu/ifi/dbs/elki/math/statistics/distribution/estimator/LogMADDistributionEstimator.java b/src/de/lmu/ifi/dbs/elki/math/statistics/distribution/estimator/LogMADDistributionEstimator.java
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+package de.lmu.ifi.dbs.elki.math.statistics.distribution.estimator;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2013
+ Ludwig-Maximilians-Universität München
+ Lehr- und Forschungseinheit für Datenbanksysteme
+ ELKI Development Team
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero 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 Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import de.lmu.ifi.dbs.elki.math.statistics.distribution.Distribution;
+
+/**
+ * Distribuition estimators that use the method of moments (MOM) in logspace.
+ * 
+ * @author Erich Schubert
+ * 
+ * @param <D> Distribution estimated.
+ */
+public interface LogMADDistributionEstimator<D extends Distribution> extends DistributionEstimator<D> {
+  /**
+   * General form of the parameter estimation
+   * 
+   * @param median Median lof log values.
+   * @param mad Median absolute deviation from median (in logspace).
+   * @param shift Shift offset that was used to avoid negative values.
+   * @return Estimated distribution
+   */
+  D estimateFromLogMedianMAD(double median, double mad, double shift);
+}