Added TrayIntegrationProvider

Author: overheadhunter

src/main/java/org/cryptomator/integrations/tray/TrayIntegrationProvider.java

@@ -0,0 +1,17 @@
+package org.cryptomator.integrations.tray;
+
+public interface TrayIntegrationProvider {
+
+	/**
+	 * Performs tasks required when the application is no longer showing any window and only accessible via
+	 * system tray (or comparable facilities).
+	 */
+	void minimizedToTray();
+
+	/**
+	 * Performs tasks required when the application becomes "visible", i.e. is transitioning from a background task
+	 * that lived in the system tray (or comparable facilities).
+	 */
+	void restoredFromTray();
+
+}