Added javadoc

pom.xml

@@ -4,7 +4,7 @@
 
   <groupId>org.piwik.java.tracking</groupId>
   <artifactId>piwik-java-tracker</artifactId>
-  <version>1.2.1-SNAPSHOT</version>
+  <version>1.3-SNAPSHOT</version>
   <packaging>jar</packaging>
 
   <name>Piwik Java Tracker</name>

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

@@ -46,6 +46,13 @@ public PiwikTracker(String hostUrl){
         this(hostUrl, DEFAULT_TIMEOUT);
     }
 
+    /**
+     * Creates a tracker that will send {@link PiwikRequest}s to the specified
+     * Tracking HTTP API endpoint.
+     * @param hostUrl url endpoint to send requests to.  Usually in the format
+     * <strong>http://your-piwik-domain.tld/piwik.php</strong>.
+     * @param timeout the timeout of the sent request in milliseconds
+     */
     public PiwikTracker(String hostUrl, int timeout){
         uriBuilder = UriBuilder.fromPath(hostUrl);
         this.timeout = timeout;