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diff --git a/bundles/org.simantics.db.procore.ui/src/org/simantics/db/procore/ui/internal/UI.java b/bundles/org.simantics.db.procore.ui/src/org/simantics/db/procore/ui/internal/UI.java
new file mode 100644
index 000000000..74fd9cd65
--- /dev/null
+++ b/bundles/org.simantics.db.procore.ui/src/org/simantics/db/procore/ui/internal/UI.java
@@ -0,0 +1,70 @@
+package org.simantics.db.procore.ui.internal;
+
+import java.io.File;
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Shell;
+import org.simantics.db.common.utils.Logger;
+import org.simantics.db.exception.InternalException;
+import org.simantics.db.server.DatabaseCorruptedException;
+import org.simantics.db.server.DatabaseLastExitException;
+import org.simantics.db.server.DatabaseProtocolException;
+import org.simantics.db.server.DatabaseStartException;
+import org.simantics.db.server.DatabaseVersionException;
+import org.simantics.db.server.GuardFileVersionException;
+import org.simantics.db.server.ProCoreException;
+
+public class UI {
+    public static boolean delete(Shell shell, File folder) {
+        return HandlerUtil.delete(shell, folder, "Database Delete", null);
+    }
+    public static boolean purge(Shell shell, File folder) {
+        return HandlerUtil.purge(shell, folder, "Database Purge", null);
+    }
+    public static boolean handleStart(Shell shell, InternalException e) throws ProCoreException {
+        if (!(e instanceof ProCoreException))
+            return false; // Can not fix this exception.
+        ProCoreException pce = (ProCoreException)e;
+        Handler handler = getStart(pce);
+        assert(null != handler);
+        return handler.start(shell, pce);
+    }
+    public static Display getDisplay() {
+        Display d = Display.getCurrent();
+        if (d == null)
+            d = Display.getDefault();
+        return d;
+    }
+    static Map<Long, Handler> startHandlers = new HashMap<Long, Handler>();
+    static {
+        startHandlers.put(GuardFileVersionException.getHandlerId(), new GuardFileVersionHandler());
+        startHandlers.put(DatabaseCorruptedException.getHandlerId(), new DatabaseCorruptedHandler());
+        startHandlers.put(DatabaseStartException.getHandlerId(), new DatabaseStartHandler());
+        startHandlers.put(DatabaseVersionException.getHandlerId(), new DatabaseVersionHandler());
+        startHandlers.put(DatabaseLastExitException.getHandlerId(), new DatabaseLastExitHandler());
+        startHandlers.put(DatabaseProtocolException.getHandlerId(), new DatabaseProtocolHandler());
+    }
+    private static <E extends ProCoreException> long getId(E pe) {
+        long id = 0;
+        try {
+            Method m = pe.getClass().getMethod("getHandlerId");
+            Object value = m.invoke(null);
+            id = (long)value;
+        } catch (RuntimeException e) {
+            Logger.defaultLogError(e);
+        } catch (Exception e) {
+            Logger.defaultLogError(e);
+        }
+        return id;
+    }
+    private static <E extends ProCoreException> Handler getStart(E e) {
+       Handler h = startHandlers.get(getId(e));
+       if (null == h)
+           return new DefaultHandler();
+       else
+           return h;
+    }
+}