Added javadoc

Author: bcsorba

src/main/java/org/piwik/java/tracking/CustomVariable.java

@@ -7,13 +7,18 @@
 package org.piwik.java.tracking;
 
 /**
- *
+ * A user defined custom variable.
  * @author brettcsorba
  */
 public final class CustomVariable{
     private final String key;
     private final String value;
 
+    /**
+     * Create a new CustomVariable
+     * @param key the key of this CustomVariable
+     * @param value the value of this CustomVariable
+     */
     public CustomVariable(String key, String value){
         if (key == null){
             throw new NullPointerException("Key cannot be null.");
@@ -25,10 +30,18 @@ public CustomVariable(String key, String value){
         this.value = value;
     }
 
+    /**
+     * Get the key of this CustomVariable
+     * @return the key of this CustomVariable
+     */
     public String getKey() {
         return key;
     }
 
+    /**
+     * Get the value of this CustomVariable
+     * @return the value of this CustomVariable
+     */
     public String getValue() {
         return value;
     }