Bug 52064 Content assist in "New Class" Dialog shows interfaces
Content Assist is available for the superclass in M7. However it also lists interfaces. If an interface is selected, the generated class "extends" it instead of "implementing" it.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/wizards/NewTypeWizardPage.java
import org.eclipse.jdt.internal.ui.preferences.JavaPreferencesSettings;
import org.eclipse.jdt.internal.ui.refactoring.contentassist.ControlContentAssistHelper;
import org.eclipse.jdt.internal.ui.refactoring.contentassist.JavaPackageCompletionProcessor;
import org.eclipse.jdt.internal.ui.refactoring.contentassist.JavaTypeCompletionProcessor;
import org.eclipse.jdt.internal.ui.util.SWTUtil;
import org.eclipse.jdt.internal.ui.wizards.NewWizardMessages;
import org.eclipse.jdt.internal.ui.wizards.SuperInterfaceSelectionDialog;
import org.eclipse.jdt.internal.ui.wizards.dialogfields.*;
/**
 * The class <code>NewTypeWizardPage</code> contains controls and validation routines 
 * for a 'New Type WizardPage'. Implementors decide which components to add and to enable. 
 * Implementors can also customize the validation code. <code>NewTypeWizardPage</code> 
 * is intended to serve as base class of all wizards that create types like applets, servlets, classes, 
 * interfaces, etc.
 * <p>
 * See <code>NewClassWizardPage</code> or <code>NewInterfaceWizardPage</code> for an
 * example usage of <code>NewTypeWizardPage</code>.
 * </p>
 * 
 * @see org.eclipse.jdt.ui.wizards.NewClassWizardPage
 * @see org.eclipse.jdt.ui.wizards.NewInterfaceWizardPage
 * 
 * @since 2.0
 */
public abstract class NewTypeWizardPage extends NewContainerWizardPage {
	/**
	 * Class used in stub creation routines to add needed imports to a 
	 * compilation unit.
	 */
	public static class ImportsManager {