Add javadoc

src/main/java/io/appium/java_client/screenrecording/BaseScreenRecordingOptions.java

@@ -39,6 +39,12 @@ public T withUploadOptions(ScreenRecordingUploadOptions uploadOptions) {
         return (T) this;
     }
 
+    /**
+     * Builds a map, which is ready to be passed to the subordinated
+     * Appium API.
+     *
+     * @return arguments mapping.
+     */
     public Map<String, Object> build() {
         final ImmutableMap.Builder<String, Object> builder = ImmutableMap.builder();
         //noinspection unchecked

src/main/java/io/appium/java_client/screenrecording/CanRecordScreen.java

@@ -39,6 +39,11 @@ default <T extends BaseStartScreenRecordingOptions> String startRecordingScreen(
         return CommandExecutionHelper.execute(this, startRecordingScreenCommand(options));
     }
 
+    /**
+     * Start asynchronous screen recording process with default options.
+     *
+     * @return Base-64 encoded content of the recorded media file.
+     */
     default String startRecordingScreen() {
         return this.execute(START_RECORDING_SCREEN).getValue().toString();
     }
@@ -55,6 +60,12 @@ default <T extends BaseStopScreenRecordingOptions> String stopRecordingScreen(T
         return CommandExecutionHelper.execute(this, stopRecordingScreenCommand(options));
     }
 
+    /**
+     * Gather the output from the previously started screen recording to a media file
+     * with default options.
+     *
+     * @return Base-64 encoded content of the recorded media file.
+     */
     default String stopRecordingScreen() {
         return this.execute(STOP_RECORDING_SCREEN).getValue().toString();
     }

src/main/java/io/appium/java_client/screenrecording/ScreenRecordingUploadOptions.java

@@ -74,6 +74,12 @@ public ScreenRecordingUploadOptions withHttpMethod(RequestMethod method) {
         return this;
     }
 
+    /**
+     * Builds a map, which is ready to be passed to the subordinated
+     * Appium API.
+     *
+     * @return arguments mapping.
+     */
     public Map<String, Object> build() {
         final ImmutableMap.Builder<String, Object> builder = ImmutableMap.builder();
         ofNullable(remotePath).map(x -> builder.put("remotePath", x));