Bug 36902 [preferences] IllegalArgumentException in JavaEditorHoverConfigurationBlock$3.keyReleased
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavaEditorHoverConfigurationBlock.java
private static final String DELIMITER= PreferencesMessages.getString("JavaEditorHoverConfigurationBlock.delimiter"); 
	
	private static class HoverConfig {
		
		private String fModifierString;
		private boolean fIsEnabled;
		private int fStateMask;
		private HoverConfig(String modifier, int stateMask, boolean enabled) {
			fModifierString= modifier;
			fIsEnabled= enabled;
			fStateMask= stateMask;
		}
	}
	private IPreferenceStore fStore;
	private HoverConfig[] fHoverConfigs;
	private Text fModifierEditor;
	private Button fEnableField;
	private List fHoverList;
	private Text fDescription;
	
	private JavaEditorPreferencePage fMainPreferencePage;
	private StatusInfo fStatus;
	public JavaEditorHoverConfigurationBlock(JavaEditorPreferencePage mainPreferencePage, IPreferenceStore store) {
		Assert.isNotNull(mainPreferencePage);