diff --git a/src/main/java/org/apache/commons/collections4/comparators/sequence/SequencesComparator.java b/src/main/java/org/apache/commons/collections4/comparators/sequence/SequencesComparator.java
index 2fd6e1937..09da0c665 100644
--- a/src/main/java/org/apache/commons/collections4/comparators/sequence/SequencesComparator.java
+++ b/src/main/java/org/apache/commons/collections4/comparators/sequence/SequencesComparator.java
@@ -90,6 +90,25 @@ public class SequencesComparator<T> {
         vUp   = new int[size];
     }
 
+    /**
+     * Get the {@link EditScript} object.
+     * <p>
+     * It is guaranteed that the objects embedded in the {@link InsertCommand
+     * insert commands} come from the second sequence and that the objects
+     * embedded in either the {@link DeleteCommand delete commands} or
+     * {@link KeepCommand keep commands} come from the first sequence. This can
+     * be important if subclassing is used for some elements in the first
+     * sequence and the <code>equals</code> method is specialized.
+     * 
+     * @return the edit script resulting from the comparison of the two
+     *         sequences
+     */
+    public EditScript<T> getScript() {
+        final EditScript<T> script = new EditScript<T>();
+        buildScript(0, sequence1.size(), 0, sequence2.size(), script);
+        return script;
+    }
+
     /**
      * Build a snake.
      *
@@ -250,22 +269,58 @@ public class SequencesComparator<T> {
     }
 
     /**
-     * Get the {@link EditScript} object.
-     * <p>
-     * It is guaranteed that the objects embedded in the {@link InsertCommand
-     * insert commands} come from the second sequence and that the objects
-     * embedded in either the {@link DeleteCommand delete commands} or
-     * {@link KeepCommand keep commands} come from the first sequence. This can
-     * be important if subclassing is used for some elements in the first
-     * sequence and the <code>equals</code> method is specialized.
-     * 
-     * @return the edit script resulting from the comparison of the two
-     *         sequences
+     * This class is a simple placeholder to hold the end part of a path
+     * under construction in a {@link SequencesComparator SequencesComparator}.
      */
-    public EditScript<T> getScript() {
-        final EditScript<T> script = new EditScript<T>();
-        buildScript(0, sequence1.size(), 0, sequence2.size(), script);
-        return script;
-    }
+    private static class Snake {
 
+        /** Start index. */
+        private final int start;
+
+        /** End index. */
+        private final int end;
+
+        /** Diagonal number. */
+        private final int diag;
+
+        /**
+         * Simple constructor. Creates a new instance of Snake with specified indices.
+         *
+         * @param start  start index of the snake
+         * @param end  end index of the snake
+         * @param diag  diagonal number
+         */ 
+        public Snake(final int start, final int end, final int diag) {
+            this.start = start;
+            this.end   = end;
+            this.diag  = diag;
+        }
+
+        /**
+         * Get the start index of the snake.
+         *
+         * @return start index of the snake
+         */
+        public int getStart() {
+            return start;
+        }
+
+        /**
+         * Get the end index of the snake.
+         *
+         * @return end index of the snake
+         */
+        public int getEnd() {
+            return end;
+        }
+
+        /**
+         * Get the diagonal number of the snake.
+         *
+         * @return diagonal number of the snake
+         */  
+        public int getDiag() {
+            return diag;
+        }
+    }
 }
diff --git a/src/main/java/org/apache/commons/collections4/comparators/sequence/Snake.java b/src/main/java/org/apache/commons/collections4/comparators/sequence/Snake.java
deleted file mode 100644
index 2589a580d..000000000
--- a/src/main/java/org/apache/commons/collections4/comparators/sequence/Snake.java
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * 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.collections4.comparators.sequence;
-
-/**
- * This class is a simple placeholder to hold the end part of a path
- * under construction in a {@link SequencesComparator SequencesComparator}.
- * <p>
- * A snake is an internal structure used in Eugene W. Myers algorithm
- * (<a href="http://www.cis.upenn.edu/~bcpierce/courses/dd/papers/diff.ps">
- * An O(ND) Difference Algorithm and Its Variations</a>).
- *
- * @since 4.0
- * @version $Id$
- */
-public class Snake {
-
-    /** Start index. */
-    private final int start;
-
-    /** End index. */
-    private final int end;
-
-    /** Diagonal number. */
-    private final int diag;
-
-    /**
-     * Simple constructor. Creates a new instance of Snake with default indices.
-     */
-    public Snake() {
-        start = -1;
-        end   = -1;
-        diag  =  0;
-    }
-
-    /**
-     * Simple constructor. Creates a new instance of Snake with specified indices.
-     *
-     * @param start  start index of the snake
-     * @param end  end index of the snake
-     * @param diag  diagonal number
-     */ 
-    public Snake(final int start, final int end, final int diag) {
-        this.start = start;
-        this.end   = end;
-        this.diag  = diag;
-    }
-
-    /**
-     * Get the start index of the snake.
-     *
-     * @return start index of the snake
-     */
-    public int getStart() {
-        return start;
-    }
-
-    /**
-     * Get the end index of the snake.
-     *
-     * @return end index of the snake
-     */
-    public int getEnd() {
-        return end;
-    }
-
-    /**
-     * Get the diagonal number of the snake.
-     *
-     * @return diagonal number of the snake
-     */  
-    public int getDiag() {
-        return diag;
-    }
-
-}