diff --git a/src/main/java/htsjdk/beta/io/bundle/BundleResourceType.java b/src/main/java/htsjdk/beta/io/bundle/BundleResourceType.java
index cca9cb9de7..b0c4c3bd6f 100644
--- a/src/main/java/htsjdk/beta/io/bundle/BundleResourceType.java
+++ b/src/main/java/htsjdk/beta/io/bundle/BundleResourceType.java
@@ -5,8 +5,7 @@
 import htsjdk.beta.plugin.variants.VariantsFormats;
 
 /**
- * Constants for specifying tandard primary content types, secondary content types, and (optional) formats
- * for resources contained in a {@link Bundle}.
+ * Constants for specifying standard content types and formats for resources contained in a {@link Bundle}.
  *
  * Bundles generally contain one primary resource, plus one or more secondary resources such as an index or md5 file.
  * Each resource has an associated content type, and optionally a format. The bundle itself has a primary content
@@ -17,8 +16,8 @@
  * correspond to one of the enum values in {@link htsjdk.beta.plugin.HtsContentType}, since each of these has a
  * corresponding {@link htsjdk.beta.plugin.HtsCodec} that handles that type of resource, such as reads or variants.
  *
- * Secondary resources can also be any string, but the standard secondary content types are defined here, i.e., for
- * primary content type "READS", a secondary content type might be "READS_INDEX".
+ * Secondary resource content types can also be any string, but the standard secondary content types are defined
+ * here, i.e., for primary content type "READS", a secondary content type might be "READS_INDEX".
  *
  * Finally, each resource in a bundle can have an optional format, which is a string that corresponds to the format
  * for that resource. For example, a primary content type of "READS" might have a format of "BAM".
diff --git a/src/main/java/htsjdk/beta/plugin/reads/ReadsBundle.java b/src/main/java/htsjdk/beta/plugin/reads/ReadsBundle.java
index 2c6d9574e0..3d2f244f14 100644
--- a/src/main/java/htsjdk/beta/plugin/reads/ReadsBundle.java
+++ b/src/main/java/htsjdk/beta/plugin/reads/ReadsBundle.java
@@ -47,9 +47,7 @@ public class ReadsBundle<T extends IOPath> extends Bundle implements Serializabl
      * @param reads An {@link IOPath}-derived object that represents a source of reads.
      */
     public ReadsBundle(final T reads) {
-        this(Arrays.asList(toInputResource(
-                BundleResourceType.CT_ALIGNED_READS,
-                ValidationUtils.nonNull(reads, BundleResourceType.CT_ALIGNED_READS))));
+        this(Arrays.asList(toInputResource(BundleResourceType.CT_ALIGNED_READS, reads)));
     }
 
     /**
@@ -59,10 +57,8 @@ public ReadsBundle(final T reads) {
      */
     public ReadsBundle(final T reads, final T index) {
         this(Arrays.asList(
-                toInputResource(BundleResourceType.CT_ALIGNED_READS, ValidationUtils.nonNull(reads, BundleResourceType.CT_ALIGNED_READS)),
-                toInputResource(
-                        BundleResourceType.CT_READS_INDEX,
-                        ValidationUtils.nonNull(index, BundleResourceType.CT_READS_INDEX))));
+                toInputResource(BundleResourceType.CT_ALIGNED_READS, reads),
+                toInputResource(BundleResourceType.CT_READS_INDEX, index)));
     }
 
     /**
@@ -174,10 +170,6 @@ public static <T extends IOPath> ReadsBundle<T> resolveIndex(
         return new ReadsBundle<>(reads);
     }
 
-    public static boolean looksLikeAReadsBundle(final IOPath rawReadPath) {
-        return rawReadPath.getURI().getPath().endsWith(BundleJSON.BUNDLE_EXTENSION);
-    }
-
     private static <T extends IOPath> IOPathResource toInputResource(final String providedContentType, final T ioPath) {
         ValidationUtils.nonNull(ioPath, "ioPath");
         final Optional<Tuple<String, String>> typePair = getInferredContentTypes(ioPath);