Fix build failure (#528)

* Fix CheckStyle violations

* Add missing override annotations

The PureUtilities CheckOverrides causes the build to fail when @OverRide annotations are missing.

src/main/java/com/laytonsmith/core/constructs/CFunction.java

@@ -100,7 +100,7 @@ public static boolean CanDryEval(ParseTree data) {
 			} else {
 				return false;
 			}
-		} catch(ConfigCompileException ex) {
+		} catch (ConfigCompileException ex) {
 			return false;
 		}
 	}

src/main/java/com/laytonsmith/core/objects/Element.java

@@ -113,6 +113,7 @@ public boolean isNativeField() {
 	 * The access modifier of the element.
 	 * @return
 	 */
+	@Override
 	public AccessModifier getAccessModifier() {
 		return accessModifier;
 	}
@@ -159,6 +160,7 @@ public String getElementName() {
 		return name;
 	}
 
+	@Override
 	public Target getTarget() {
 		return t;
 	}

src/main/java/com/laytonsmith/core/objects/ElementDefinition.java

@@ -9,7 +9,6 @@
 import com.laytonsmith.core.constructs.CNull;
 import com.laytonsmith.core.constructs.Construct;
 import com.laytonsmith.core.constructs.Target;
-import com.laytonsmith.core.environments.Environment;
 import com.laytonsmith.core.natives.interfaces.Mixed;
 import java.lang.reflect.Field;
 import java.util.Objects;
@@ -135,6 +134,7 @@ public boolean isNativeField() {
 	 * The access modifier of the element.
 	 * @return
 	 */
+	@Override
 	public AccessModifier getAccessModifier() {
 		return accessModifier;
 	}
@@ -174,6 +174,7 @@ public String getElementName() {
 		return name;
 	}
 
+	@Override
 	public Target getTarget() {
 		return t;
 	}

src/main/java/com/laytonsmith/core/objects/ObjectDefinition.java

@@ -20,7 +20,6 @@
 import java.util.EnumSet;
 import java.util.HashSet;
 import java.util.List;
-import java.util.Map;
 import java.util.Objects;
 import java.util.Set;