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diff --git a/src/main/java/org/apache/commons/math3/analysis/interpolation/UnivariateInterpolator.java b/src/main/java/org/apache/commons/math3/analysis/interpolation/UnivariateInterpolator.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.math3.analysis.interpolation;
+
+import org.apache.commons.math3.analysis.UnivariateFunction;
+import org.apache.commons.math3.exception.DimensionMismatchException;
+import org.apache.commons.math3.exception.MathIllegalArgumentException;
+
+/**
+ * Interface representing a univariate real interpolating function.
+ *
+ */
+public interface UnivariateInterpolator {
+    /**
+     * Compute an interpolating function for the dataset.
+     *
+     * @param xval Arguments for the interpolation points.
+     * @param yval Values for the interpolation points.
+     * @return a function which interpolates the dataset.
+     * @throws MathIllegalArgumentException
+     * if the arguments violate assumptions made by the interpolation
+     * algorithm.
+     * @throws DimensionMismatchException if arrays lengthes do not match
+     */
+    UnivariateFunction interpolate(double xval[], double yval[])
+        throws MathIllegalArgumentException, DimensionMismatchException;
+}