Clean up and document API of MissingGraphElementPropertyException

src/de/tudarmstadt/maki/simonstrator/api/common/graph/MissingGraphElementPropertyException.java

@@ -23,15 +23,23 @@ package de.tudarmstadt.maki.simonstrator.api.common.graph;
 /**
  * This exception may be used to indicate that a necessary property of an
  * {@link INode} or {@link IEdge} is not set.
+ * 
+ * @author Roland Kluge - Initial Implementation
  */
 public class MissingGraphElementPropertyException extends RuntimeException {
 
-	public MissingGraphElementPropertyException(IEdge edge, GraphElementProperty<?> property) {
-		super(String.format("Edge %s is missing required property %s", edge, property));
-	}
-
-	public MissingGraphElementPropertyException(INode node, GraphElementProperty<?> property) {
-		super(String.format("Node %s is missing required property %s", node, property));
+	/**
+	 * Creates an exception to indicate that the given {@link IElement} is
+	 * lacking the given {@link GraphElementProperty}.
+	 * 
+	 * @param element
+	 *            the element
+	 * @param property
+	 *            the property
+	 */
+	public MissingGraphElementPropertyException(final IElement element,
+			final GraphElementProperty<? extends Number> property) {
+		super(String.format("Element %s is missing required property %s", element.toString(), property));
 	}
 
 	private static final long serialVersionUID = 8622616464282511495L;