Make constant final

org.eclipse.jdt.debug/model/org/eclipse/jdt/internal/debug/core/JavaDebugUtils.java

diff --git a/org.eclipse.jdt.debug/model/org/eclipse/jdt/internal/debug/core/JavaDebugUtils.java b/org.eclipse.jdt.debug/model/org/eclipse/jdt/internal/debug/core/JavaDebugUtils.java
index a64f86b..1a90348 100644
--- a/org.eclipse.jdt.debug/model/org/eclipse/jdt/internal/debug/core/JavaDebugUtils.java
+++ b/org.eclipse.jdt.debug/model/org/eclipse/jdt/internal/debug/core/JavaDebugUtils.java
@@ -52,7 +52,7 @@
 public class JavaDebugUtils {
 
 	// The value must match org.eclipse.jdi.internal.VirtualMachineImpl#JAVA_STRATUM_NAME}
-	public static String JAVA_STRATUM = "Java"; //$NON-NLS-1$
+	public static final String JAVA_STRATUM = "Java"; //$NON-NLS-1$
 
 	/**
 	 * Resolves and returns a type from the Java model that corresponds to the