Added docs

src/main/java/com/uddernetworks/paintassist/PaintAssist.java

@@ -7,9 +7,26 @@
 import java.util.Optional;
 
 public interface PaintAssist {
+
+    /**
+     * Authenticates via {@link Authenticator#authenticate()} and initializes via {@link ActionListener#init()} the
+     * current client.
+     *
+     * @return The {@link Tokeninfo} generated if successful
+     */
     Optional<Tokeninfo> activate();
 
+    /**
+     * Gets the {@link Authenticator} used
+     *
+     * @return The {@link Authenticator}
+     */
     Authenticator getAuthenticator();
 
+    /**
+     * Gets the {@link ActionListener} used
+     *
+     * @return The {@link ActionListener}
+     */
     ActionListener getActionListener();
 }

src/main/java/com/uddernetworks/paintassist/actions/ActionListener.java

@@ -6,10 +6,25 @@
 
 public interface ActionListener {
 
+    /**
+     * Initializes to and connects to the firebase database. Requires authentication via
+     * {@link com.uddernetworks.paintassist.auth.Authenticator} beforehand.
+     *
+     * @throws IOException If an IO exception occurs
+     */
     void init() throws IOException;
 
+    /**
+     * Adds a listener to activate when database changes happen.
+     *
+     * @param onRun The BiConsumer invoked when database changes happening, the parameters being the {@link Action}s
+     *              being ran, and the time they were added to by the server in milliseconds.
+     */
     void listen(BiConsumer<List<Action>, Long> onRun);
 
+    /**
+     * Clears all listeners added by {@link ActionListener#listen(BiConsumer)}.
+     */
     void clearListeners();
 
 }

src/main/java/com/uddernetworks/paintassist/actions/DefaultActionsListener.java

@@ -27,6 +27,8 @@ public DefaultActionsListener(PaintAssist paintAssist) {
 
     @Override
     public void init() throws IOException {
+        if (!this.paintAssist.getAuthenticator().isAuthenticated()) throw new RuntimeException("Tried to init without authentication.");
+
         FirebaseOptions options = new FirebaseOptions.Builder()
                 .setCredentials(GoogleCredentials.getApplicationDefault())
                 .setDatabaseUrl("https://ms-paint-ide.firebaseio.com")

src/main/java/com/uddernetworks/paintassist/auth/Authenticator.java

@@ -4,17 +4,41 @@
 import com.google.api.services.oauth2.model.Tokeninfo;
 
 import java.util.Optional;
-import java.util.function.Consumer;
 
 public interface Authenticator {
 
+    /**
+     * Gets if the client has been authenticated.
+     *
+     * @return If the client has been authenticated
+     */
     boolean isAuthenticated();
 
+    /**
+     * Resets authentication and deletes local token cache files
+     */
     void unAuthenticate();
 
+    /**
+     * Attempts to authenticate the use, returning the {@link Tokeninfo} if successful. If presented with a code 400
+     * error for whatever reason, it will try 3 times total. If all times fail, it will accept its fate and return an
+     * empty {@link Optional} and spit an error message in console.
+     *
+     * @return The {@link Tokeninfo} of the client if successful
+     */
     Optional<Tokeninfo> authenticate();
 
+    /**
+     * Gets the {@link Tokeninfo} made by invoking {@link Authenticator#authenticate()} previously, if existent.
+     *
+     * @return The {@link Tokeninfo} previously generated
+     */
     Optional<Tokeninfo> getTokenInfo();
 
+    /**
+     * Gets the {@link Oauth2} used internally.
+     *
+     * @return The {@link Oauth2} used
+     */
     Oauth2 getOAuth2();
 }