FindBugs tweaks

src/main/java/edu/jhuapl/tinkerpop/AccumuloBulkIngester.java

@@ -269,7 +269,7 @@ public final class AccumuloBulkIngester {
    * builder.finish();
    * </PRE>
    */
-  public final class PropertyBuilder {
+  public static final class PropertyBuilder {
 
     final String id;
     final BatchWriter writer;

src/main/java/edu/jhuapl/tinkerpop/AccumuloGraphConfiguration.java

@@ -18,6 +18,7 @@ import java.io.File;
 import java.io.IOException;
 import java.io.Serializable;
 import java.lang.reflect.Field;
+import java.nio.file.Files;
 import java.util.Arrays;
 import java.util.Iterator;
 import java.util.List;
@@ -1046,9 +1047,10 @@ implements Serializable {
   }
 
   private File createTempDir() throws IOException {
-    File temp = File.createTempFile(AccumuloGraphConfiguration.class.getSimpleName(), ".mini.tmp");
-    temp.delete();
-    temp.mkdir();
+    File temp = File.createTempFile(AccumuloGraphConfiguration
+        .class.getSimpleName(), ".mini.tmp");
+    Files.delete(temp.toPath());
+    Files.createDirectory(temp.toPath());
     return temp;
   }
 

src/main/java/edu/jhuapl/tinkerpop/mapreduce/ElementOutputFormat.java

@@ -69,7 +69,7 @@ public class ElementOutputFormat extends OutputFormat<NullWritable,Element> {
     return new NullOutputFormat<Text,Mutation>().getOutputCommitter(context);
   }
 
-  class ElementRecordWriter extends RecordWriter<NullWritable,Element> {
+  static class ElementRecordWriter extends RecordWriter<NullWritable,Element> {
     AccumuloGraphConfiguration config;
 
     protected ElementRecordWriter(TaskAttemptContext context) {

src/main/java/edu/jhuapl/tinkerpop/tables/namedindex/NamedIndexListTableWrapper.java

@@ -95,7 +95,9 @@ public class NamedIndexListTableWrapper extends BaseIndexedItemsListTableWrapper
       return null;
 
     } finally {
-      scan.close();
+      if (scan != null) {
+        scan.close();
+      }
     }
   }