Fixed CheckStyle warnings.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1372208 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/commons/math3/distribution/AbstractMultivariateRealDistribution.java

@@ -21,17 +21,17 @@ import org.apache.commons.math3.exception.util.LocalizedFormats;
 import org.apache.commons.math3.random.RandomGenerator;
 
 /**
- * Base class for probability distributions on the multivariate reals.
- * Default implementations are provided for some of the methods that do
- * not vary from distribution to distribution.
+ * Base class for multivariate probability distributions.
  *
+ * @version $Id$
+ * @since 3.1
  */
 public abstract class AbstractMultivariateRealDistribution
     implements MultivariateRealDistribution {
-    /** The number of dimensions or columns in the multivariate distribution. */
-    private final int numDimensions;
     /** RNG instance used to generate samples from the distribution. */
     protected final RandomGenerator random;
+    /** The number of dimensions or columns in the multivariate distribution. */
+    private final int numDimensions;
 
     /**
      * @param rng Random number generator.
@@ -49,8 +49,10 @@ public abstract class AbstractMultivariateRealDistribution
     }
 
     /**
+     * Gets the number of dimensions (i.e. the number of random variables) of
+     * the distribution.
      *
-     * @return the number of dimensions in the multivariate distribution .
+     * @return the number of dimensions.
      */
     public int getDimensions() {
         return numDimensions;

src/main/java/org/apache/commons/math3/distribution/MultivariateNormalDistribution.java

@@ -1,3 +1,19 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.apache.commons.math3.distribution;
 
 import org.apache.commons.math3.exception.DimensionMismatchException;
@@ -18,6 +34,9 @@ import org.apache.commons.math3.util.MathArrays;
  * Multivariate normal distribution (Wikipedia)</a>
  * @see <a href="http://mathworld.wolfram.com/MultivariateNormalDistribution.html">
  * Multivariate normal distribution (MathWorld)</a>
+ *
+ * @version $Id$
+ * @since 3.1
  */
 public class MultivariateNormalDistribution
     extends AbstractMultivariateRealDistribution {
@@ -42,6 +61,12 @@ public class MultivariateNormalDistribution
      *
      * @param means Vector of means.
      * @param covariances Covariance matrix.
+     * @throws DimensionMismatchException if the arrays length are
+     * inconsistent.
+     * @throws SingularMatrixException if the eigenvalue decomposition cannot
+     * be performed on the provided covariance matrix.
+     * @throws NonPositiveDefiniteMatrixException if any of the eigenvalues is
+     * negative.
      */
     public MultivariateNormalDistribution(final double[] means,
                                           final double[][] covariances)
@@ -62,6 +87,12 @@ public class MultivariateNormalDistribution
      * @param rng Random Number Generator.
      * @param means Vector of means.
      * @param covariances Covariance matrix.
+     * @throws DimensionMismatchException if the arrays length are
+     * inconsistent.
+     * @throws SingularMatrixException if the eigenvalue decomposition cannot
+     * be performed on the provided covariance matrix.
+     * @throws NonPositiveDefiniteMatrixException if any of the eigenvalues is
+     * negative.
      */
     public MultivariateNormalDistribution(RandomGenerator rng,
                                           final double[] means,

src/main/java/org/apache/commons/math3/distribution/MultivariateRealDistribution.java

@@ -16,10 +16,7 @@
  */
 package org.apache.commons.math3.distribution;
 
-import org.apache.commons.math3.exception.DimensionMismatchException;
 import org.apache.commons.math3.exception.NotStrictlyPositiveException;
-import org.apache.commons.math3.exception.NumberIsTooLargeException;
-import org.apache.commons.math3.exception.OutOfRangeException;
 
 /**
  * Base interface for multivariate distributions on the reals.
@@ -27,6 +24,9 @@ import org.apache.commons.math3.exception.OutOfRangeException;
  * This is based largely on the RealDistribution interface, but cumulative
  * distribution functions are not required because they are often quite
  * difficult to compute for multivariate distributions.
+ *
+ * @version $Id$
+ * @since 3.1
  */
 public interface MultivariateRealDistribution {
     /**
@@ -51,7 +51,7 @@ public interface MultivariateRealDistribution {
      * @param x Point at which the PDF is evaluated.
      * @return the value of the probability density function at point {@code x}.
      */
-    double density(double[] x) throws DimensionMismatchException;
+    double density(double[] x);
 
     /**
      * Access the lower bound of the support.