Added classes for manage authentication and retrieve data to/from fitbit... but the code needs some mods!

src/main/java/manage/OAuth2ClientCredentials.java

@@ -0,0 +1,26 @@
+package manage;
+
+public class OAuth2ClientCredentials {
+
+        /** Value of the "API Key". */
+        public static final String API_KEY = "22CSTL";
+
+        /** Value of the "API Secret". */
+        public static final String API_SECRET = "ea2452013abd35609940ce5601960a08";
+
+        /** Port in the "Callback URL". */
+        public static final int PORT = 8080;
+
+        /** Domain name in the "Callback URL". */
+        public static final String DOMAIN = "http://127.0.0.1:8080/";
+
+        public static void errorIfNotSpecified() {
+            if (API_KEY.startsWith("Enter ") || API_SECRET.startsWith("Enter ")) {
+                System.out.println(
+                        "Enter API Key and API Secret from http://www.dailymotion.com/profile/developer"
+                                + " into API_KEY and API_SECRET in " + OAuth2ClientCredentials.class);
+                System.exit(1);
+            }
+        }
+    }
+