1 files changed, 10 insertions, 1 deletions
diff --git a/java/src/main/java/org/pablotron/luigi/errors/UnknownKeyError.java b/java/src/main/java/org/pablotron/luigi/errors/UnknownKeyError.java
index 7b0ae4c..8710a83 100644
--- a/java/src/main/java/org/pablotron/luigi/errors/UnknownKeyError.java
+++ b/java/src/main/java/org/pablotron/luigi/errors/UnknownKeyError.java
@@ -1,6 +1,15 @@
 package org.pablotron.luigi.errors;
 
-public class UnknownKeyError extends UnknownEntryError {
+/**
+ * Thrown when an unknown key is encountered while running a
+ * template.
+ */
+public final class UnknownKeyError extends UnknownEntryError {
+  /**
+   * Create a new UnknownKeyError instance.
+   *
+   * @param name Unknown key.
+   */
   public UnknownKeyError(final String name) {
     super("key", name);
   }