diff --git a/.settings/org.eclipse.jdt.core.prefs b/.settings/org.eclipse.jdt.core.prefs
index b21ee841bc..a16c9399cb 100644
--- a/.settings/org.eclipse.jdt.core.prefs
+++ b/.settings/org.eclipse.jdt.core.prefs
@@ -34,7 +34,7 @@ org.eclipse.jdt.core.compiler.problem.missingEnumCaseDespiteDefault=disabled
 org.eclipse.jdt.core.compiler.problem.missingHashCodeMethod=error
 org.eclipse.jdt.core.compiler.problem.missingOverrideAnnotation=warning
 org.eclipse.jdt.core.compiler.problem.missingOverrideAnnotationForInterfaceMethodImplementation=enabled
-org.eclipse.jdt.core.compiler.problem.missingSerialVersion=warning
+org.eclipse.jdt.core.compiler.problem.missingSerialVersion=ignore
 org.eclipse.jdt.core.compiler.problem.missingSynchronizedOnInheritedMethod=error
 org.eclipse.jdt.core.compiler.problem.noEffectAssignment=error
 org.eclipse.jdt.core.compiler.problem.noImplicitStringConversion=error
diff --git a/src/games/stendhal/client/gui/imageviewer/ViewPanel.java b/src/games/stendhal/client/gui/imageviewer/ViewPanel.java
index 90c70c056e..1bf65dfa2e 100644
--- a/src/games/stendhal/client/gui/imageviewer/ViewPanel.java
+++ b/src/games/stendhal/client/gui/imageviewer/ViewPanel.java
@@ -39,7 +39,5 @@ abstract class ViewPanel extends JComponent {
 	 *
 	 * @param maxSize of the panel
 	 */
-	public void prepareView(Dimension maxSize) {
-		// do nothing
-	}
+	public abstract void prepareView(Dimension maxSize);
 }