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diff --git a/src/main/java/org/apache/commons/math3/linear/DefaultRealMatrixChangingVisitor.java b/src/main/java/org/apache/commons/math3/linear/DefaultRealMatrixChangingVisitor.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.linear;
+
+/**
+ * Default implementation of the {@link RealMatrixChangingVisitor} interface.
+ *
+ * <p>This class is a convenience to create custom visitors without defining all methods. This class
+ * provides default implementations that do nothing.
+ *
+ * @since 2.0
+ */
+public class DefaultRealMatrixChangingVisitor implements RealMatrixChangingVisitor {
+    /** {@inheritDoc} */
+    public void start(
+            int rows, int columns, int startRow, int endRow, int startColumn, int endColumn) {}
+
+    /** {@inheritDoc} */
+    public double visit(int row, int column, double value) {
+        return value;
+    }
+
+    /** {@inheritDoc} */
+    public double end() {
+        return 0;
+    }
+}