diff --git a/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/GenotypeConcordanceStep.java b/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/GenotypeConcordanceStep.java
index d9e2785ea..0ee8d3488 100644
--- a/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/GenotypeConcordanceStep.java
+++ b/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/GenotypeConcordanceStep.java
@@ -7,6 +7,7 @@
 import htsjdk.variant.variantcontext.VariantContext;
 import htsjdk.variant.vcf.VCFFileReader;
 import htsjdk.variant.vcf.VCFHeader;
+import org.jetbrains.annotations.Nullable;
 import org.json.JSONObject;
 import org.labkey.api.pipeline.PipelineJobException;
 import org.labkey.api.sequenceanalysis.SequenceAnalysisService;
@@ -22,7 +23,6 @@
 import org.labkey.sequenceanalysis.pipeline.SequenceTaskHelper;
 import org.labkey.sequenceanalysis.run.util.VariantAnnotatorWrapper;
 
-import javax.annotation.Nullable;
 import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
diff --git a/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/GenotypeFiltrationStep.java b/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/GenotypeFiltrationStep.java
index 37c754704..8b63d72eb 100644
--- a/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/GenotypeFiltrationStep.java
+++ b/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/GenotypeFiltrationStep.java
@@ -1,6 +1,7 @@
 package org.labkey.sequenceanalysis.run.variant;
 
 import htsjdk.samtools.util.Interval;
+import org.jetbrains.annotations.Nullable;
 import org.json.JSONArray;
 import org.json.JSONObject;
 import org.labkey.api.pipeline.PipelineJobException;
@@ -16,7 +17,6 @@
 import org.labkey.api.sequenceanalysis.run.VariantFiltrationWrapper;
 import org.labkey.sequenceanalysis.pipeline.SequenceTaskHelper;
 
-import javax.annotation.Nullable;
 import java.io.File;
 import java.util.ArrayList;
 import java.util.Arrays;
diff --git a/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/KingInferenceStep.java b/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/KingInferenceStep.java
index 831631723..aa7d6da7b 100644
--- a/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/KingInferenceStep.java
+++ b/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/KingInferenceStep.java
@@ -8,6 +8,7 @@
 import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.math.NumberUtils;
 import org.apache.logging.log4j.Logger;
+import org.jetbrains.annotations.Nullable;
 import org.json.JSONObject;
 import org.labkey.api.pipeline.PipelineJobException;
 import org.labkey.api.sequenceanalysis.SequenceAnalysisService;
@@ -22,11 +23,9 @@
 import org.labkey.api.sequenceanalysis.run.AbstractCommandPipelineStep;
 import org.labkey.api.sequenceanalysis.run.AbstractCommandWrapper;
 
-import javax.annotation.Nullable;
 import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 
 public class KingInferenceStep extends AbstractCommandPipelineStep<KingInferenceStep.KingWrapper> implements VariantProcessingStep
diff --git a/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/MendelianViolationReportStep.java b/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/MendelianViolationReportStep.java
index 052a1a982..b29befc8a 100644
--- a/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/MendelianViolationReportStep.java
+++ b/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/MendelianViolationReportStep.java
@@ -1,6 +1,7 @@
 package org.labkey.sequenceanalysis.run.variant;
 
 import htsjdk.samtools.util.Interval;
+import org.jetbrains.annotations.Nullable;
 import org.json.JSONObject;
 import org.labkey.api.pipeline.PipelineJobException;
 import org.labkey.api.sequenceanalysis.pipeline.AbstractPipelineStep;
@@ -14,7 +15,6 @@
 import org.labkey.api.sequenceanalysis.pipeline.VariantProcessingStepOutputImpl;
 import org.labkey.sequenceanalysis.pipeline.ProcessVariantsHandler;
 
-import javax.annotation.Nullable;
 import java.io.File;
 import java.util.ArrayList;
 import java.util.Arrays;
diff --git a/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/OutputVariantsStartingInIntervalsStep.java b/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/OutputVariantsStartingInIntervalsStep.java
index 15174dfcd..2d02bc997 100644
--- a/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/OutputVariantsStartingInIntervalsStep.java
+++ b/SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/OutputVariantsStartingInIntervalsStep.java
@@ -2,6 +2,7 @@
 
 import htsjdk.samtools.util.Interval;
 import org.apache.logging.log4j.Logger;
+import org.jetbrains.annotations.Nullable;
 import org.labkey.api.pipeline.PipelineJobException;
 import org.labkey.api.sequenceanalysis.SequenceAnalysisService;
 import org.labkey.api.sequenceanalysis.pipeline.AbstractPipelineStep;
@@ -14,12 +15,10 @@
 import org.labkey.api.sequenceanalysis.run.AbstractDiscvrSeqWrapper;
 import org.labkey.api.writer.PrintWriters;
 
-import javax.annotation.Nullable;
 import java.io.File;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 
 /**