diff --git a/core/src/main/java/org/elasticsearch/bootstrap/BootstrapCheck.java b/core/src/main/java/org/elasticsearch/bootstrap/BootstrapCheck.java
index c06c8d12fdc..45b36ee1a8c 100644
--- a/core/src/main/java/org/elasticsearch/bootstrap/BootstrapCheck.java
+++ b/core/src/main/java/org/elasticsearch/bootstrap/BootstrapCheck.java
@@ -69,7 +69,7 @@ final class BootstrapCheck {
      * @param checks        the checks to execute
      */
     // visible for testing
-    static void check(boolean enforceLimits, List<Check> checks) {
+    static void check(final boolean enforceLimits, final List<Check> checks) {
         final ESLogger logger = Loggers.getLogger(BootstrapCheck.class);
 
         for (Check check : checks) {
@@ -114,7 +114,7 @@ final class BootstrapCheck {
     }
 
     // the list of checks to execute
-    private static List<Check> checks(Settings settings) {
+    private static List<Check> checks(final Settings settings) {
         List<Check> checks = new ArrayList<>();
         FileDescriptorCheck fileDescriptorCheck
                 = Constants.MAC_OS_X ? new OsXFileDescriptorCheck() : new FileDescriptorCheck();
@@ -165,7 +165,7 @@ final class BootstrapCheck {
             this(1 << 16);
         }
 
-        protected FileDescriptorCheck(int limit) {
+        protected FileDescriptorCheck(final int limit) {
             if (limit <= 0) {
                 throw new IllegalArgumentException("limit must be positive but was [" + limit + "]");
             }
@@ -199,7 +199,7 @@ final class BootstrapCheck {
 
         private final boolean mlockallSet;
 
-        public MlockallCheck(boolean mlockAllSet) {
+        public MlockallCheck(final boolean mlockAllSet) {
             this.mlockallSet = mlockAllSet;
         }
 
diff --git a/core/src/test/java/org/elasticsearch/bootstrap/BootstrapCheckTests.java b/core/src/test/java/org/elasticsearch/bootstrap/BootstrapCheckTests.java
index 000ae7b068f..4fbf43de9ac 100644
--- a/core/src/test/java/org/elasticsearch/bootstrap/BootstrapCheckTests.java
+++ b/core/src/test/java/org/elasticsearch/bootstrap/BootstrapCheckTests.java
@@ -63,7 +63,7 @@ public class BootstrapCheckTests extends ESTestCase {
         try {
             BootstrapCheck.check(true, Collections.singletonList(check));
             fail("should have failed due to max file descriptors too low");
-        } catch (RuntimeException e) {
+        } catch (final RuntimeException e) {
             assertThat(e.getMessage(), containsString("max file descriptors"));
         }
 
@@ -92,7 +92,7 @@ public class BootstrapCheckTests extends ESTestCase {
             private final boolean isMemoryLocked;
             private final boolean shouldFail;
 
-            public MlockallCheckTestCase(boolean mlockallSet, boolean isMemoryLocked, boolean shouldFail) {
+            public MlockallCheckTestCase(final boolean mlockallSet, final boolean isMemoryLocked, final boolean shouldFail) {
                 this.mlockallSet = mlockallSet;
                 this.isMemoryLocked = isMemoryLocked;
                 this.shouldFail = shouldFail;
@@ -118,7 +118,7 @@ public class BootstrapCheckTests extends ESTestCase {
                 try {
                     BootstrapCheck.check(true, Collections.singletonList(check));
                     fail("should have failed due to memory not being locked");
-                } catch (RuntimeException e) {
+                } catch (final RuntimeException e) {
                     assertThat(
                             e.getMessage(),
                             containsString("Memory locking requested for elasticsearch process but memory is not locked"));