added classic do not use this constructor

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/lang/trunk@156331 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/commons/lang/text/Interpolation.java

@@ -21,6 +21,17 @@ public class Interpolation {
     /** The marker used to end a variable. */
     private static final String SYMBOLIC_VALUE_MARKER_END = "}";
 
+    /**
+     * <p><code>Interpolation</code> instances should NOT be constructed in
+     * standard programming. 
+     *
+     * <p>This constructor is public to permit tools that require a JavaBean
+     * instance to operate.</p>
+     */
+    public Interpolation() {
+        // no init.
+    }
+
     /**
      * <p>Interpolates a String to replace variables of the form <code>${...}</code>.</p>
      *