diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/commitgraph/CommitGraphWriter.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/commitgraph/CommitGraphWriter.java
index 0324ef680..38ae02957 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/commitgraph/CommitGraphWriter.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/commitgraph/CommitGraphWriter.java
@@ -158,9 +158,8 @@ public Stats write(@NonNull ProgressMonitor monitor,
 		return Stats.from(bloomFilterChunks);
 	}
 
-	private static List<ChunkHeader> createCoreChunks(int hashsz, GraphCommits graphCommits)
-			throws MissingObjectException,
-			IncorrectObjectTypeException, CorruptObjectException, IOException {
+	private static List<ChunkHeader> createCoreChunks(int hashsz,
+			GraphCommits graphCommits) {
 		List<ChunkHeader> chunks = new ArrayList<>();
 		chunks.add(new ChunkHeader(CHUNK_ID_OID_FANOUT, GRAPH_FANOUT_SIZE));
 		chunks.add(new ChunkHeader(CHUNK_ID_OID_LOOKUP,