Bug 76579 Formatter setup export: If file exists, overwritten w/o warning [code formatter]
On exporting java code formatter settings: If the selected file already exists, it is overwritten without warning.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/formatter/CodingStyleConfigurationBlock.java
public ButtonController() {
			fProfileManager.addObserver(this);
			fNewButton.addSelectionListener(this);
			fRenameButton.addSelectionListener(this);
			fEditButton.addSelectionListener(this);
			fDeleteButton.addSelectionListener(this);
			fSaveButton.addSelectionListener(this);
			fLoadButton.addSelectionListener(this);
			update(fProfileManager, null);
		}
		public void update(Observable o, Object arg) {
			final boolean state= ((ProfileManager)o).getSelected() instanceof CustomProfile;
			fEditButton.setText(state ? FormatterMessages.getString("CodingStyleConfigurationBlock.edit_button.desc")  
			    : FormatterMessages.getString("CodingStyleConfigurationBlock.show_button.desc")); 
			fDeleteButton.setEnabled(state);
			fSaveButton.setEnabled(state);
			fRenameButton.setEnabled(state);
		}
		public void widgetSelected(SelectionEvent e) {
			final Button button= (Button)e.widget;
			if (button == fSaveButton)
				saveButtonPressed();
			else if (button == fEditButton)