Add nullability annotations to getAlbum method

diff --git a/src/main/java/net/pterodactylus/sone/core/Core.java b/src/main/java/net/pterodactylus/sone/core/Core.java
index a4fde13..4474e46 100644 (file)
--- a/src/main/java/net/pterodactylus/sone/core/Core.java
+++ b/src/main/java/net/pterodactylus/sone/core/Core.java
@@ -40,6 +40,9 @@ import java.util.concurrent.TimeUnit;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidAlbumFound;
 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidImageFound;
 import net.pterodactylus.sone.core.ConfigurationSoneParser.InvalidParentAlbumFound;
@@ -534,7 +537,8 @@ public class Core extends AbstractService implements SoneProvider, PostProvider,
         * @return The album with the given ID, or {@code null} if no album with the
         *         given ID exists
         */
-       public Album getAlbum(String albumId) {
+       @Nullable
+       public Album getAlbum(@Nonnull String albumId) {
                return database.getAlbum(albumId).orNull();
        }