Issue #451: add RegexpMultiline#noConsecutiveLines to checkstyle config

Author: Calixte

config/checkstyle-checks.xml

@@ -116,6 +116,12 @@
         <property name="fileExtensions" value="xml"/>
         <property name="message" value="Content of source tag should not be Indented"/>
     </module>
+    <module name="RegexpMultiline">
+        <property name="id" value="noConsecutiveLines"/>
+        <property name="format" value="\r?\n[\t ]*\r?\n[\t ]*\r?\n"/>
+        <property name="fileExtensions" value="java,xml,properties"/>
+        <property name="message" value="Unnecessary consecutive lines"/>
+    </module>
     <module name="RegexpMultiline">
         <property name="id" value="noEmptyFile"/>
         <property name="format" value="^\s*$" />

net.sf.eclipsecs.ui/src/net/sf/eclipsecs/ui/config/CheckConfigurationWorkingSetEditor.java

@@ -23,7 +23,6 @@
 import java.io.File;
 import java.util.ArrayList;
 
-import org.eclipse.core.resources.IProject;
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.dialogs.MessageDialog;
 import org.eclipse.jface.viewers.ArrayContentProvider;
@@ -686,7 +685,7 @@ public void selectionChanged(SelectionChangedEvent event) {
         } else {
           mConfigurationDescription.setText(""); //$NON-NLS-1$
           if (mIsShowUsage) {
-            mUsageView.setInput(new ArrayList<IProject>());
+            mUsageView.setInput(new ArrayList<>());
           }
         }
         mEditButton.setEnabled(configSelected);
@@ -705,6 +704,4 @@ public void selectionChanged(SelectionChangedEvent event) {
       }
     }
   }
-
-
 }

net.sf.eclipsecs.ui/src/net/sf/eclipsecs/ui/quickfixes/CheckstyleMarkerResolutionGenerator.java

@@ -59,6 +59,4 @@ private boolean isCheckstyleMarker(IMarker marker) {
       return false;
     }
   }
-
-
 }