override getScriptNature() only once for project wizard

diff --git a/plugins/org.eclipse.dltk.python.ui/src/org/eclipse/dltk/python/internal/ui/wizards/PythonProjectCreationWizard.java b/plugins/org.eclipse.dltk.python.ui/src/org/eclipse/dltk/python/internal/ui/wizards/PythonProjectCreationWizard.java
index f87fb9e..30b1c83 100644
--- a/plugins/org.eclipse.dltk.python.ui/src/org/eclipse/dltk/python/internal/ui/wizards/PythonProjectCreationWizard.java
+++ b/plugins/org.eclipse.dltk.python.ui/src/org/eclipse/dltk/python/internal/ui/wizards/PythonProjectCreationWizard.java

@@ -53,10 +53,6 @@
 					super(composite);
 				}
 
-				protected String getCurrentLanguageNature() {
-					return PythonNature.NATURE_ID;
-				}
-
 				protected String getIntereprtersPreferencePageId() {
 					return "org.eclipse.dltk.python.preferences.interpreters"; //$NON-NLS-1$
 				}
@@ -66,6 +62,11 @@
 				}
 			};
 
+			@Override
+			public String getScriptNature() {
+				return PythonNature.NATURE_ID;
+			}
+
 			protected IInterpreterGroup createInterpreterGroup(Composite parent) {
 				return new PythonInterpreterGroup(parent);
 			}
@@ -88,10 +89,6 @@
 						useNewSourcePage(), null);
 			}
 
-			protected String getScriptNature() {
-				return PythonNature.NATURE_ID;
-			}
-
 			protected IPreferenceStore getPreferenceStore() {
 				return PythonUI.getDefault().getPreferenceStore();
 			}