fixing the broken test

src/main/java/org/broadinstitute/hellbender/utils/tsv/SimpleCSVWriterWrapperWithHeader.java

@@ -15,7 +15,7 @@
 /**
  * A simple helper class wrapper around CSVWriter that has the ingrained concept of a header line with indexed fields
  *
- * The expected use case for this class is that first {@link #addHeaderLine} is called with a list of the column names
+ * The expected use case for this class is that first {@link #setHeaderLine} is called with a list of the column names
  * which will be used to determine the number of columns per line as well as how the header is indexed. Then in order to
  * construct a new line call {@link #getNewLineBuilder} to get a line builder for each line, which then has convienent
  * methods for individually assigning column values based on the header line etc. Once a line is finished being mutated
@@ -62,7 +62,7 @@ public SimpleCSVWriterWrapperWithHeader(final Writer writer, final char separato
      *
      * @param columns Ordered list of header lines to be built into the CSV
      */
-    public void addHeaderLine(List<String> columns) {
+    public void setHeaderLine(List<String> columns) {
         if (headerMap != null) {
             throw new GATKException("Should not be adding multiple header lines to a file");
         }

src/test/java/org/broadinstitute/hellbender/utils/tsv/SimpleCSVWriterWrapperWithHeaderUnitTest.java

@@ -10,8 +10,6 @@
 import java.nio.file.Path;
 import java.util.Arrays;
 
-import static org.testng.Assert.*;
-
 public class SimpleCSVWriterWrapperWithHeaderUnitTest extends GATKBaseTest {
 
 
@@ -25,6 +23,8 @@ public void testWriteToBucketPath() throws IOException {
         SimpleCSVWriterWrapperWithHeader localWriter = new SimpleCSVWriterWrapperWithHeader(localPath, '\t');
 
         String[] header = new String[]{"a","b","c"};
+        bucketWriter.setHeaderLine(Arrays.asList(header));
+        localWriter.setHeaderLine(Arrays.asList(header));
 
         for (int i = 0; i < 100; i++) {
             SimpleCSVWriterWrapperWithHeader.SimpleCSVWriterLineBuilder bucketLine = bucketWriter.getNewLineBuilder();