diff --git a/airline-core/src/main/java/com/github/rvesse/airline/types/numerics/bases/Binary.java b/airline-core/src/main/java/com/github/rvesse/airline/types/numerics/bases/Binary.java
index a81137276..fb49e5f26 100644
--- a/airline-core/src/main/java/com/github/rvesse/airline/types/numerics/bases/Binary.java
+++ b/airline-core/src/main/java/com/github/rvesse/airline/types/numerics/bases/Binary.java
@@ -1,8 +1,29 @@
+/**
+ * Copyright (C) 2010-16 the original author or authors.
+ *
+ * Licensed 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 com.github.rvesse.airline.types.numerics.bases;
 
 import com.github.rvesse.airline.types.numerics.ComplexNumericTypeConverter;
 import com.github.rvesse.airline.types.numerics.NumericCandidate;
 
+/**
+ * A type converter that supports binary numbers
+ * 
+ * @author rvesse
+ *
+ */
 public class Binary extends ComplexNumericTypeConverter {
 
     @Override
diff --git a/airline-core/src/main/java/com/github/rvesse/airline/types/numerics/bases/Hexadecimal.java b/airline-core/src/main/java/com/github/rvesse/airline/types/numerics/bases/Hexadecimal.java
index 700647208..6e92fef75 100644
--- a/airline-core/src/main/java/com/github/rvesse/airline/types/numerics/bases/Hexadecimal.java
+++ b/airline-core/src/main/java/com/github/rvesse/airline/types/numerics/bases/Hexadecimal.java
@@ -1,8 +1,29 @@
+/**
+ * Copyright (C) 2010-16 the original author or authors.
+ *
+ * Licensed 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 com.github.rvesse.airline.types.numerics.bases;
 
 import com.github.rvesse.airline.types.numerics.ComplexNumericTypeConverter;
 import com.github.rvesse.airline.types.numerics.NumericCandidate;
 
+/**
+ * A type converter that supports hexadecimal numbers
+ * 
+ * @author rvesse
+ *
+ */
 public class Hexadecimal extends ComplexNumericTypeConverter {
 
     @Override
diff --git a/airline-core/src/main/java/com/github/rvesse/airline/types/numerics/bases/Octal.java b/airline-core/src/main/java/com/github/rvesse/airline/types/numerics/bases/Octal.java
index 36db9246b..87e5d989f 100644
--- a/airline-core/src/main/java/com/github/rvesse/airline/types/numerics/bases/Octal.java
+++ b/airline-core/src/main/java/com/github/rvesse/airline/types/numerics/bases/Octal.java
@@ -1,8 +1,28 @@
+/**
+ * Copyright (C) 2010-16 the original author or authors.
+ *
+ * Licensed 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 com.github.rvesse.airline.types.numerics.bases;
 
 import com.github.rvesse.airline.types.numerics.ComplexNumericTypeConverter;
 import com.github.rvesse.airline.types.numerics.NumericCandidate;
 
+/**
+ * A type converter that supports octal numbers
+ * @author rvesse
+ *
+ */
 public class Octal extends ComplexNumericTypeConverter {
 
     @Override
diff --git a/airline-core/src/test/java/com/github/rvesse/airline/args/ArgsFlagNegation.java b/airline-core/src/test/java/com/github/rvesse/airline/args/ArgsFlagNegation.java
index 510f58e9e..4da321bb7 100644
--- a/airline-core/src/test/java/com/github/rvesse/airline/args/ArgsFlagNegation.java
+++ b/airline-core/src/test/java/com/github/rvesse/airline/args/ArgsFlagNegation.java
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2010-16 the original author or authors.
+ *
+ * Licensed 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 com.github.rvesse.airline.args;
 
 import com.github.rvesse.airline.annotations.Command;
diff --git a/airline-core/src/test/java/com/github/rvesse/airline/parser/TestFlagNegation.java b/airline-core/src/test/java/com/github/rvesse/airline/parser/TestFlagNegation.java
index eda573756..ed367e5b3 100644
--- a/airline-core/src/test/java/com/github/rvesse/airline/parser/TestFlagNegation.java
+++ b/airline-core/src/test/java/com/github/rvesse/airline/parser/TestFlagNegation.java
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2010-16 the original author or authors.
+ *
+ * Licensed 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 com.github.rvesse.airline.parser;
 
 import org.testng.Assert;