Add missing Override tags -> trigger travis build.

src/test/java/org/apache/commons/math4/random/RandomAdaptorTest.java

@@ -71,43 +71,54 @@ public class RandomAdaptorTest {
             this.value = value;
         }
 
+        @Override
         public boolean nextBoolean() {
             return false;
         }
 
+        @Override
         public void nextBytes(byte[] bytes) {
         }
 
+        @Override
         public double nextDouble() {
             return value;
         }
 
+        @Override
         public float nextFloat() {
             return (float) value;
         }
 
+        @Override
         public double nextGaussian() {
             return value;
         }
 
+        @Override
         public int nextInt() {
             return (int) value;
         }
 
+        @Override
         public int nextInt(int n) {
             return (int) value;
         }
 
+        @Override
         public long nextLong() {
             return (int) value;
         }
 
+        @Override
         public void setSeed(int seed) {
         }
 
+        @Override
         public void setSeed(int[] seed) {
         }
 
+        @Override
         public void setSeed(long seed) {
         }
 

src/test/java/org/apache/commons/math4/random/SynchronizedRandomGeneratorTest.java

@@ -98,6 +98,7 @@ public class SynchronizedRandomGeneratorTest {
         final List<Callable<Double>> tasks = new ArrayList<Callable<Double>>();
         for (int i = 0; i < numGenerators; i++) {
             tasks.add(new Callable<Double>() {
+                    @Override
                     public Double call() {
                         Double lastValue = 0d;
                         for (int j = 0; j < numSamples; j++) {