import net.sourceforge.phpdt.core.IJavaProject;
import net.sourceforge.phpdt.core.IPackageFragment;
import net.sourceforge.phpdt.core.IPackageFragmentRoot;
+import net.sourceforge.phpdt.core.IParent;
+import net.sourceforge.phpdt.core.IProblemRequestor;
import net.sourceforge.phpdt.core.IWorkingCopy;
-import net.sourceforge.phpdt.core.JavaModelException;
import net.sourceforge.phpdt.core.JavaCore;
-import net.sourceforge.phpdt.internal.ui.util.PHPFileUtil;
-import net.sourceforge.phpeclipse.PHPeclipsePlugin;
+import net.sourceforge.phpdt.core.JavaModelException;
+import net.sourceforge.phpdt.core.WorkingCopyOwner;
+import net.sourceforge.phpdt.core.compiler.IProblem;
import net.sourceforge.phpdt.internal.core.builder.PHPBuilder;
import net.sourceforge.phpdt.internal.core.util.Util;
+import net.sourceforge.phpdt.internal.ui.util.PHPFileUtil;
+import net.sourceforge.phpeclipse.PHPeclipsePlugin;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.runtime.Plugin;
import org.eclipse.core.runtime.Preferences;
import org.eclipse.core.runtime.Status;
-
-import net.sourceforge.phpdt.internal.core.DefaultWorkingCopyOwner;
-
-import net.sourceforge.phpdt.internal.core.DeltaProcessingState;
-
-import net.sourceforge.phpdt.internal.core.DeltaProcessor;
-
-import net.sourceforge.phpdt.core.IParent;
-import net.sourceforge.phpdt.internal.core.JavaElementInfo;
-
-import net.sourceforge.phpdt.core.IProblemRequestor;
-import net.sourceforge.phpdt.core.WorkingCopyOwner;
-import net.sourceforge.phpdt.core.compiler.IProblem;
-import net.sourceforge.phpdt.internal.core.CompilationUnit;
-import net.sourceforge.phpdt.internal.core.JavaElement;
-import net.sourceforge.phpdt.internal.core.JavaElementDeltaBuilder;
-import net.sourceforge.phpdt.internal.core.JavaModelManager.PerWorkingCopyInfo;
+import org.eclipse.core.runtime.Preferences.PropertyChangeEvent;
/**
* The <code>JavaModelManager</code> manages instances of <code>IJavaModel</code>.