Fix imports.

logging/src/test/java/com/dmdirc/addons/logging/HistoryWindowTest.java

 
 package com.dmdirc.addons.logging;
 
+import static junit.framework.TestCase.assertEquals;
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
 import com.dmdirc.config.ConfigBinder;
 import com.dmdirc.interfaces.Connection;
 import com.dmdirc.interfaces.EventBus;
 import com.dmdirc.interfaces.WindowModel;
 import com.dmdirc.interfaces.config.AggregateConfigProvider;
-import com.dmdirc.ui.messages.BackBuffer;
 import com.dmdirc.ui.messages.BackBufferFactory;
-
+import com.dmdirc.ui.messages.BackBufferImpl;
 import java.nio.file.Paths;
 import java.util.Optional;
-
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.runners.MockitoJUnitRunner;
 
-import static junit.framework.TestCase.assertEquals;
-import static org.mockito.Matchers.any;
-import static org.mockito.Mockito.times;
-import static org.mockito.Mockito.verify;
-import static org.mockito.Mockito.when;
-
 @RunWith(MockitoJUnitRunner.class)
 public class HistoryWindowTest {