Bug 63883 Cannot configure option for enabling/disabling exclusion filters or custom output folders on a per project basis
Build M9 JDT/Core supports setting enablement for exclusion patterns and custom output folders on a per project basis. This isn't surfaced in the UI. There is only a global flag in workspace preferences.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/CompilerConfigurationBlock.java
addComboBox(composite, label, PREF_PB_UNUSED_DECLARED_THROWN_EXCEPTION, errorWarningIgnore, errorWarningIgnoreLabels, 0);
		
		label= PreferencesMessages.getString("CompilerConfigurationBlock.pb_unused_throwing_exception_when_overriding.label"); 
		addCheckBox(composite, label, PREF_PB_UNUSED_DECLARED_THROWN_EXCEPTION_WHEN_OVERRIDING, enabledDisabled, indent);
		return composite;
	}
	
	private Composite createJavadocTabContent(TabFolder folder) {
		String[] errorWarningIgnore= new String[] { ERROR, WARNING, IGNORE };
		
		String[] errorWarningIgnoreLabels= new String[] {
				PreferencesMessages.getString("CompilerConfigurationBlock.error"),  
				PreferencesMessages.getString("CompilerConfigurationBlock.warning"), 
				PreferencesMessages.getString("CompilerConfigurationBlock.ignore") 
		};
		
		String[] enabledDisabled= new String[] { ENABLED, DISABLED };
		
		String[] visibilities= new String[] { PUBLIC, PROTECTED, DEFAULT, PRIVATE  };
		
		String[] visibilitiesLabels= new String[] {
				PreferencesMessages.getString("CompilerConfigurationBlock.public"), 
				PreferencesMessages.getString("CompilerConfigurationBlock.protected"), 
				PreferencesMessages.getString("CompilerConfigurationBlock.default"), 
				PreferencesMessages.getString("CompilerConfigurationBlock.private") 
		};
		int nColumns= 3;
				
		GridLayout layout = new GridLayout();
		layout.numColumns= nColumns;