diff --git a/src/controller/java/src/chip/devicecontroller/model/AttributeState.java b/src/controller/java/src/chip/devicecontroller/model/AttributeState.java
index db7eefc21b878d..2489dcd52f167f 100644
--- a/src/controller/java/src/chip/devicecontroller/model/AttributeState.java
+++ b/src/controller/java/src/chip/devicecontroller/model/AttributeState.java
@@ -25,8 +25,8 @@
 public final class AttributeState {
   private static final String TAG = "AttributeState";
 
-  private Object valueObject;
-  private byte[] tlv;
+  private final Object valueObject;
+  private final byte[] tlv;
   private JSONObject json;
 
   public AttributeState(Object valueObject, byte[] tlv, String jsonString) {
diff --git a/src/controller/java/src/chip/devicecontroller/model/ChipEventPath.java b/src/controller/java/src/chip/devicecontroller/model/ChipEventPath.java
index f3798cc826047c..2f70a97f81d614 100644
--- a/src/controller/java/src/chip/devicecontroller/model/ChipEventPath.java
+++ b/src/controller/java/src/chip/devicecontroller/model/ChipEventPath.java
@@ -22,8 +22,8 @@
 
 /** An event path that should be used for requests. */
 public class ChipEventPath {
-  private ChipPathId endpointId, clusterId, eventId;
-  private boolean isUrgent;
+  private final ChipPathId endpointId, clusterId, eventId;
+  private final boolean isUrgent;
 
   private ChipEventPath(
       ChipPathId endpointId, ChipPathId clusterId, ChipPathId eventId, boolean isUrgent) {
diff --git a/src/controller/java/src/chip/devicecontroller/model/ChipPathId.java b/src/controller/java/src/chip/devicecontroller/model/ChipPathId.java
index ec88838c9ede30..31511d7eda462b 100644
--- a/src/controller/java/src/chip/devicecontroller/model/ChipPathId.java
+++ b/src/controller/java/src/chip/devicecontroller/model/ChipPathId.java
@@ -21,8 +21,8 @@
 
 /** Class representing a potentially wildcard identifier for endpoints/clusters/attributes. */
 public class ChipPathId {
-  private long id;
-  private IdType type;
+  private final long id;
+  private final IdType type;
 
   public enum IdType {
     // Enum names are read by JNI code.
diff --git a/src/controller/java/src/chip/devicecontroller/model/EventState.java b/src/controller/java/src/chip/devicecontroller/model/EventState.java
index 72b14c1391dc93..705f453d70c197 100644
--- a/src/controller/java/src/chip/devicecontroller/model/EventState.java
+++ b/src/controller/java/src/chip/devicecontroller/model/EventState.java
@@ -27,13 +27,13 @@ public final class EventState {
   public static final int MILLIS_SINCE_EPOCH = 1;
   private static final String TAG = "EventState";
 
-  private long eventNumber;
-  private int priorityLevel;
-  private int timestampType;
-  private long timestampValue;
+  private final long eventNumber;
+  private final int priorityLevel;
+  private final int timestampType;
+  private final long timestampValue;
 
-  private Object valueObject;
-  private byte[] tlv;
+  private final Object valueObject;
+  private final byte[] tlv;
   private JSONObject json;
 
   public EventState(