interesting issue about @Override with interface

Just got interesting issue with compiling class file with `@Override` annotation on method which implements interface method. I tried to set up [moquette project][1] in eclipse and got compile error Description Resource Path Location Type The method decodable(IoSession, IoBuffer) of type PubAckDecoder must override a superclass method PubAckDecoder.java /moquette-parser/src/main/java/org/dna/mqtt/moquette/proto line 22 Java Problem That seems correct as java 1.5 compliance level is used. However this project is successfully built with maven! That is strange for me. There is following argument file which is used for javac compiler: "-d" "E:/workspaces/mqtt/moquette-mqtt/parser/target/classes" "-classpath" "E:/workspaces/mqtt/moquette-mqtt/parser/target/classes;e:/_mavenRepository/org/apache/mina/mina-core/2.0.4/mina-core-2.0.4.jar;e:/_mavenRepository/org/slf4j/slf4j-api/1.6.1/slf4j-api-1.6.1.jar;e:/_mavenRepository/org/slf4j/slf4j-log4j12/1.6.4/slf4j-log4j12-1.6.4.jar;e:/_mavenRepository/log4j/log4j/1.2.16/log4j-1.2.16.jar;" "E:/workspaces/mqtt/moquette-mqtt/parser/src/main/java/org/dna/mqtt/moquette/proto/PubAckDecoder.java" "-g" "-nowarn" "-target" "1.5" "-source" "1.5" "-encoding" "UTF-8" I removed all other source files and left just `PubAckDecoder` which contains the error. What am I missing? Why it is built with maven when it should not? **UPD** Maven configuration for compiler plugin: org.apache.maven.plugins maven-compiler-plugin true 1.5 1.5 [1]: http://code.google.com/p/moquette-mqtt/source/checkout
Well what source version is Maven using to build it?

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